- for 5.0.75

[packages/mysql.git] / mysql-microslow_innodb.patch

diff -r 25523be1816e include/my_getopt.h
--- a/include/my_getopt.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/include/my_getopt.h	Mon Dec 22 00:26:39 2008 -0800
@@ -28,7 +28,8 @@
 #define GET_ULL        8
 #define GET_STR        9
 #define GET_STR_ALLOC 10
-#define GET_DISABLED  11
+#define GET_DOUBLE    11
+#define GET_DISABLED  12
 
 #define GET_ASK_ADDR	 128
 #define GET_TYPE_MASK	 127
diff -r 25523be1816e include/my_time.h
--- a/include/my_time.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/include/my_time.h	Mon Dec 22 00:26:39 2008 -0800
@@ -140,7 +140,7 @@
 int my_date_to_str(const MYSQL_TIME *l_time, char *to);
 int my_datetime_to_str(const MYSQL_TIME *l_time, char *to);
 int my_TIME_to_str(const MYSQL_TIME *l_time, char *to);
-
+ulonglong my_timer(ulonglong *ltime, ulonglong frequency);
 C_MODE_END
 
 #endif /* _my_time_h_ */
diff -r 25523be1816e innobase/buf/buf0buf.c
--- a/innobase/buf/buf0buf.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/buf/buf0buf.c	Mon Dec 22 00:26:39 2008 -0800
@@ -37,6 +37,9 @@
 #include "log0log.h"
 #include "trx0undo.h"
 #include "srv0srv.h"
+
+/* prototypes for new functions added to ha_innodb.cc */
+trx_t* innobase_get_trx();
 
 /*
 		IMPLEMENTATION OF THE BUFFER POOL
@@ -1086,6 +1089,36 @@
 	return(block);
 }
 
+inline void _increment_page_get_statistics(buf_block_t* block, trx_t* trx)
+{
+	ulint           block_hash;
+	ulint           block_hash_byte;
+	byte            block_hash_offset;
+
+	ut_ad(block);
+
+	if (!srv_slow_log || !trx || !trx->take_stats)
+		return;
+
+	if (!trx->distinct_page_access_hash) {
+		trx->distinct_page_access_hash = mem_alloc(DPAH_SIZE);
+		memset(trx->distinct_page_access_hash, 0, DPAH_SIZE);
+	}
+
+        block_hash = ut_hash_ulint((block->space << 20) + block->space +
+					block->offset, DPAH_SIZE << 3);
+	block_hash_byte = block_hash >> 3;
+	block_hash_offset = (byte) block_hash & 0x07;
+	if (block_hash_byte < 0 || block_hash_byte >= DPAH_SIZE)
+		fprintf(stderr, "!!! block_hash_byte = %lu  block_hash_offset = %lu !!!\n", block_hash_byte, block_hash_offset);
+	if (block_hash_offset < 0 || block_hash_offset > 7)
+		fprintf(stderr, "!!! block_hash_byte = %lu  block_hash_offset = %lu !!!\n", block_hash_byte, block_hash_offset);
+	if ((trx->distinct_page_access_hash[block_hash_byte] & ((byte) 0x01 << block_hash_offset)) == 0)
+		trx->distinct_page_access++;
+	trx->distinct_page_access_hash[block_hash_byte] |= (byte) 0x01 << block_hash_offset;
+	return;
+}
+
 /************************************************************************
 This is the general function used to get access to a database page. */
 
@@ -1108,6 +1141,11 @@
 	ulint		fix_type;
 	ibool		success;
 	ibool		must_read;
+	trx_t*          trx = NULL;
+	ulint           sec;
+	ulint           ms;
+	ib_longlong     start_time;
+	ib_longlong     finish_time;
 	
 	ut_ad(mtr);
 	ut_ad((rw_latch == RW_S_LATCH)
@@ -1119,6 +1157,9 @@
 #ifndef UNIV_LOG_DEBUG
 	ut_ad(!ibuf_inside() || ibuf_page(space, offset));
 #endif
+	if (srv_slow_log) {
+		trx = innobase_get_trx();
+	}
 	buf_pool->n_page_gets++;
 loop:
 	block = NULL;
@@ -1148,7 +1189,7 @@
 			return(NULL);
 		}
 
-		buf_read_page(space, offset);
+		buf_read_page(space, offset, trx);
 
 #ifdef UNIV_DEBUG
 		buf_dbg_counter++;
@@ -1261,6 +1302,11 @@
 		        /* Let us wait until the read operation
 			completes */
 
+			if (srv_slow_log && trx && trx->take_stats)
+			{
+				ut_usectime(&sec, &ms);
+				start_time = (ib_longlong)sec * 1000000 + ms;
+			}
 		        for (;;) {
 				mutex_enter(&block->mutex);
 
@@ -1275,6 +1321,12 @@
 
 				       break;
 				}
+			}
+                	if (srv_slow_log && trx && trx->take_stats && start_time)
+			{
+				ut_usectime(&sec, &ms);
+        	        	finish_time = (ib_longlong)sec * 1000000 + ms;
+                		trx->io_reads_wait_timer += (ulint)(finish_time - start_time);
 			}
 		}
 
@@ -1296,12 +1348,17 @@
 		/* In the case of a first access, try to apply linear
 		read-ahead */
 
-		buf_read_ahead_linear(space, offset);
+		buf_read_ahead_linear(space, offset, trx);
 	}
 
 #ifdef UNIV_IBUF_DEBUG
 	ut_a(ibuf_count_get(block->space, block->offset) == 0);
 #endif
+
+	if (srv_slow_log) {
+		_increment_page_get_statistics(block, trx);
+	}
+	
 	return(block->frame);		
 }
 
@@ -1326,6 +1383,7 @@
 	ibool		accessed;
 	ibool		success;
 	ulint		fix_type;
+	trx_t*          trx = NULL;
 
 	ut_ad(mtr && block);
 	ut_ad((rw_latch == RW_S_LATCH) || (rw_latch == RW_X_LATCH));
@@ -1440,13 +1498,18 @@
 		read-ahead */
 
 		buf_read_ahead_linear(buf_frame_get_space_id(guess),
-					buf_frame_get_page_no(guess));
+					buf_frame_get_page_no(guess), trx);
 	}
 
 #ifdef UNIV_IBUF_DEBUG
 	ut_a(ibuf_count_get(block->space, block->offset) == 0);
 #endif
 	buf_pool->n_page_gets++;
+
+	if (srv_slow_log) {
+		trx = innobase_get_trx();
+		_increment_page_get_statistics(block, trx);
+	}
 
 	return(TRUE);
 }
@@ -1470,6 +1533,7 @@
 	buf_block_t*	block;
 	ibool		success;
 	ulint		fix_type;
+	trx_t*		trx = NULL;
 
 	ut_ad(mtr);
 	ut_ad((rw_latch == RW_S_LATCH) || (rw_latch == RW_X_LATCH));
@@ -1558,6 +1622,11 @@
 		|| (ibuf_count_get(block->space, block->offset) == 0));
 #endif
 	buf_pool->n_page_gets++;
+
+	if (srv_slow_log) {
+		trx = innobase_get_trx();
+		_increment_page_get_statistics(block, trx);
+	}
 
 	return(TRUE);
 }
diff -r 25523be1816e innobase/buf/buf0rea.c
--- a/innobase/buf/buf0rea.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/buf/buf0rea.c	Mon Dec 22 00:26:39 2008 -0800
@@ -70,7 +70,8 @@
 			treat the tablespace as dropped; this is a timestamp we
 			use to stop dangling page reads from a tablespace
 			which we have DISCARDed + IMPORTed back */
-	ulint	offset)	/* in: page number */
+	ulint	offset,	/* in: page number */
+	trx_t*  trx)
 {
 	buf_block_t*	block;
 	ulint		wake_later;
@@ -140,10 +141,10 @@
 
 	ut_a(block->state == BUF_BLOCK_FILE_PAGE);
 
-	*err = fil_io(OS_FILE_READ | wake_later,
+	*err = _fil_io(OS_FILE_READ | wake_later,
 			sync, space,
 			offset, 0, UNIV_PAGE_SIZE,
-			(void*)block->frame, (void*)block);
+			(void*)block->frame, (void*)block, trx);
 	ut_a(*err == DB_SUCCESS);
 
 	if (sync) {
@@ -174,8 +175,9 @@
 			the page at the given page number does not get
 			read even if we return a value > 0! */
 	ulint	space,	/* in: space id */
-	ulint	offset)	/* in: page number of a page which the current thread
+	ulint	offset,	/* in: page number of a page which the current thread
 			wants to access */
+	trx_t*  trx)
 {
 	ib_longlong	tablespace_version;
 	buf_block_t*	block;
@@ -270,7 +272,7 @@
 		if (!ibuf_bitmap_page(i)) {
 			count += buf_read_page_low(&err, FALSE, ibuf_mode
 					| OS_AIO_SIMULATED_WAKE_LATER,
-				        space, tablespace_version, i);
+				        space, tablespace_version, i, trx);
 			if (err == DB_TABLESPACE_DELETED) {
 				ut_print_timestamp(stderr);
 				fprintf(stderr,
@@ -314,7 +316,8 @@
 			/* out: number of page read requests issued: this can
 			be > 1 if read-ahead occurred */
 	ulint	space,	/* in: space id */
-	ulint	offset)	/* in: page number */
+	ulint	offset,	/* in: page number */
+	trx_t*  trx)
 {
 	ib_longlong	tablespace_version;
 	ulint		count;
@@ -323,13 +326,13 @@
 
 	tablespace_version = fil_space_get_version(space);
 
-	count = buf_read_ahead_random(space, offset);
+	count = buf_read_ahead_random(space, offset, trx);
 
 	/* We do the i/o in the synchronous aio mode to save thread
 	switches: hence TRUE */
 
 	count2 = buf_read_page_low(&err, TRUE, BUF_READ_ANY_PAGE, space,
-					tablespace_version, offset);
+					tablespace_version, offset, trx);
         srv_buf_pool_reads+= count2;
 	if (err == DB_TABLESPACE_DELETED) {
 	        ut_print_timestamp(stderr);
@@ -374,8 +377,9 @@
 /*==================*/
 			/* out: number of page read requests issued */
 	ulint	space,	/* in: space id */
-	ulint	offset)	/* in: page number of a page; NOTE: the current thread
+	ulint	offset,	/* in: page number of a page; NOTE: the current thread
 			must want access to this page (see NOTE 3 above) */
+	trx_t*  trx)
 {
 	ib_longlong	tablespace_version;
 	buf_block_t*	block;
@@ -556,7 +560,7 @@
 		if (!ibuf_bitmap_page(i)) {
 			count += buf_read_page_low(&err, FALSE, ibuf_mode
 					| OS_AIO_SIMULATED_WAKE_LATER,
-					space, 	tablespace_version, i);
+					space, 	tablespace_version, i, trx);
 			if (err == DB_TABLESPACE_DELETED) {
 				ut_print_timestamp(stderr);
 				fprintf(stderr,
@@ -625,10 +629,10 @@
 	for (i = 0; i < n_stored; i++) {
 		if ((i + 1 == n_stored) && sync) {
 			buf_read_page_low(&err, TRUE, BUF_READ_ANY_PAGE,
-				space_ids[i], space_versions[i], page_nos[i]);
+				space_ids[i], space_versions[i], page_nos[i], NULL);
 		} else {
 			buf_read_page_low(&err, FALSE, BUF_READ_ANY_PAGE,
-				space_ids[i], space_versions[i], page_nos[i]);
+				space_ids[i], space_versions[i], page_nos[i], NULL);
 		}
 
 		if (err == DB_TABLESPACE_DELETED) {
@@ -704,11 +708,11 @@
 
 		if ((i + 1 == n_stored) && sync) {
 			buf_read_page_low(&err, TRUE, BUF_READ_ANY_PAGE, space,
-					tablespace_version, page_nos[i]);
+					tablespace_version, page_nos[i], NULL);
 		} else {
 			buf_read_page_low(&err, FALSE, BUF_READ_ANY_PAGE
 					| OS_AIO_SIMULATED_WAKE_LATER,
-				       space, tablespace_version, page_nos[i]);
+				       space, tablespace_version, page_nos[i], NULL);
 		}
 	}
 	
diff -r 25523be1816e innobase/fil/fil0fil.c
--- a/innobase/fil/fil0fil.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/fil/fil0fil.c	Mon Dec 22 00:26:39 2008 -0800
@@ -3527,7 +3527,7 @@
 			node->name, node->handle, buf,
 			offset_low, offset_high,
 			UNIV_PAGE_SIZE * n_pages,
-			NULL, NULL);
+			NULL, NULL, NULL);
 #endif
 		if (success) {
 			node->size += n_pages;
@@ -3851,7 +3851,7 @@
 Reads or writes data. This operation is asynchronous (aio). */
 
 ulint
-fil_io(
+_fil_io(
 /*===*/
 				/* out: DB_SUCCESS, or DB_TABLESPACE_DELETED
 				if we are trying to do i/o on a tablespace
@@ -3877,8 +3877,9 @@
 	void*	buf,		/* in/out: buffer where to store read data
 				or from where to write; in aio this must be
 				appropriately aligned */
-	void*	message)	/* in: message for aio handler if non-sync
+	void*	message,	/* in: message for aio handler if non-sync
 				aio used, else ignored */
+	trx_t*  trx)
 {
 	fil_system_t*	system		= fil_system;
 	ulint		mode;
@@ -4018,7 +4019,7 @@
 #else
 	/* Queue the aio request */
 	ret = os_aio(type, mode | wake_later, node->name, node->handle, buf,
-				offset_low, offset_high, len, node, message);
+				offset_low, offset_high, len, node, message, trx);
 #endif
 	ut_a(ret);
 
diff -r 25523be1816e innobase/include/buf0rea.h
--- a/innobase/include/buf0rea.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/include/buf0rea.h	Mon Dec 22 00:26:39 2008 -0800
@@ -10,6 +10,7 @@
 #define buf0rea_h
 
 #include "univ.i"
+#include "trx0types.h"
 #include "buf0types.h"
 
 /************************************************************************
@@ -25,7 +26,8 @@
 			/* out: number of page read requests issued: this can
 			be > 1 if read-ahead occurred */
 	ulint	space,	/* in: space id */
-	ulint	offset);/* in: page number */
+	ulint	offset,	/* in: page number */
+	trx_t*  trx);
 /************************************************************************
 Applies linear read-ahead if in the buf_pool the page is a border page of
 a linear read-ahead area and all the pages in the area have been accessed.
@@ -55,8 +57,9 @@
 /*==================*/
 			/* out: number of page read requests issued */
 	ulint	space,	/* in: space id */
-	ulint	offset);/* in: page number of a page; NOTE: the current thread
+	ulint	offset,	/* in: page number of a page; NOTE: the current thread
 			must want access to this page (see NOTE 3 above) */
+	trx_t*  trx);
 /************************************************************************
 Issues read requests for pages which the ibuf module wants to read in, in
 order to contract the insert buffer tree. Technically, this function is like
diff -r 25523be1816e innobase/include/fil0fil.h
--- a/innobase/include/fil0fil.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/include/fil0fil.h	Mon Dec 22 00:26:39 2008 -0800
@@ -534,8 +534,11 @@
 /************************************************************************
 Reads or writes data. This operation is asynchronous (aio). */
 
+#define fil_io(type, sync, space_id, block_offset, byte_offset, len, buf, message) \
+	_fil_io(type, sync, space_id, block_offset, byte_offset, len, buf, message, NULL)
+
 ulint
-fil_io(
+_fil_io(
 /*===*/
 				/* out: DB_SUCCESS, or DB_TABLESPACE_DELETED
 				if we are trying to do i/o on a tablespace
@@ -561,8 +564,9 @@
 	void*	buf,		/* in/out: buffer where to store read data
 				or from where to write; in aio this must be
 				appropriately aligned */
-	void*	message);	/* in: message for aio handler if non-sync
+	void*	message,	/* in: message for aio handler if non-sync
 				aio used, else ignored */
+	trx_t*  trx);
 /************************************************************************
 Reads data from a space to a buffer. Remember that the possible incomplete
 blocks at the end of file are ignored: they are not taken into account when
diff -r 25523be1816e innobase/include/os0file.h
--- a/innobase/include/os0file.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/include/os0file.h	Mon Dec 22 00:26:39 2008 -0800
@@ -10,6 +10,8 @@
 #define os0file_h
 
 #include "univ.i"
+
+#include "trx0types.h"
 
 #ifndef __WIN__
 #include <dirent.h>
@@ -421,8 +423,11 @@
 /***********************************************************************
 Requests a synchronous read operation. */
 
+#define os_file_read(file, buf, offset, offset_high, n)         \
+		_os_file_read(file, buf, offset, offset_high, n, NULL)
+
 ibool
-os_file_read(
+_os_file_read(
 /*=========*/
 				/* out: TRUE if request was
 				successful, FALSE if fail */
@@ -432,7 +437,8 @@
 				offset where to read */
 	ulint		offset_high,/* in: most significant 32 bits of
 				offset */
-	ulint		n);	/* in: number of bytes to read */	
+	ulint		n,	/* in: number of bytes to read */
+	trx_t*		trx);
 /***********************************************************************
 Rewind file to its start, read at most size - 1 bytes from it to str, and
 NUL-terminate str. All errors are silently ignored. This function is
@@ -584,7 +590,8 @@
 				can be used to identify a completed aio
 				operation); if mode is OS_AIO_SYNC, these
 				are ignored */
-	void*		message2);
+	void*		message2,
+	trx_t*          trx);
 /****************************************************************************
 Wakes up all async i/o threads so that they know to exit themselves in
 shutdown. */
diff -r 25523be1816e innobase/include/srv0srv.h
--- a/innobase/include/srv0srv.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/include/srv0srv.h	Mon Dec 22 00:26:39 2008 -0800
@@ -26,6 +26,8 @@
 at a time */
 #define SRV_AUTO_EXTEND_INCREMENT	\
 	(srv_auto_extend_increment * ((1024 * 1024) / UNIV_PAGE_SIZE))
+
+extern ibool	srv_slow_log;
 
 /* This is set to TRUE if the MySQL user has set it in MySQL */
 extern ibool	srv_lower_case_table_names;
diff -r 25523be1816e innobase/include/trx0trx.h
--- a/innobase/include/trx0trx.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/include/trx0trx.h	Mon Dec 22 00:26:39 2008 -0800
@@ -668,6 +668,17 @@
 	/*------------------------------*/
 	char detailed_error[256];	/* detailed error message for last
 					error, or empty. */
+	/*------------------------------*/
+	ulint		io_reads;
+	ib_longlong     io_read;
+	ulint		io_reads_wait_timer;
+	ib_longlong     lock_que_wait_ustarted;
+	ulint           lock_que_wait_timer;
+	ulint           innodb_que_wait_timer;
+	ulint           distinct_page_access;
+#define	DPAH_SIZE	8192
+	byte*		distinct_page_access_hash;
+	ibool		take_stats;
 };
 
 #define TRX_MAX_N_THREADS	32	/* maximum number of concurrent
diff -r 25523be1816e innobase/lock/lock0lock.c
--- a/innobase/lock/lock0lock.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/lock/lock0lock.c	Mon Dec 22 00:26:39 2008 -0800
@@ -1806,6 +1806,8 @@
 {
 	lock_t*	lock;
 	trx_t*	trx;
+	ulint   sec;
+	ulint   ms;
 	
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(mutex_own(&kernel_mutex));
@@ -1861,6 +1863,10 @@
 	trx->que_state = TRX_QUE_LOCK_WAIT;
 	trx->was_chosen_as_deadlock_victim = FALSE;
 	trx->wait_started = time(NULL);
+	if (srv_slow_log && trx->take_stats) {
+		ut_usectime(&sec, &ms);
+		trx->lock_que_wait_ustarted = (ib_longlong)sec * 1000000 + ms;
+	}
 
 	ut_a(que_thr_stop(thr));
 
@@ -3514,7 +3520,9 @@
 {
 	lock_t*	lock;
 	trx_t*	trx;
-	
+	ulint   sec;
+	ulint   ms;
+
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(mutex_own(&kernel_mutex));
 #endif /* UNIV_SYNC_DEBUG */
@@ -3564,6 +3572,10 @@
 		return(DB_SUCCESS);
 	}
 	
+	if (srv_slow_log && trx->take_stats) {
+		ut_usectime(&sec, &ms);
+		trx->lock_que_wait_ustarted = (ib_longlong)sec * 1000000 + ms;
+	}
 	trx->que_state = TRX_QUE_LOCK_WAIT;
 	trx->was_chosen_as_deadlock_victim = FALSE;
 	trx->wait_started = time(NULL);
diff -r 25523be1816e innobase/os/os0file.c
--- a/innobase/os/os0file.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/os/os0file.c	Mon Dec 22 00:26:39 2008 -0800
@@ -14,6 +14,7 @@
 #include "srv0start.h"
 #include "fil0fil.h"
 #include "buf0buf.h"
+#include "trx0sys.h"
 
 #if defined(UNIV_HOTBACKUP) && defined(__WIN__)
 /* Add includes for the _stat() call to compile on Windows */
@@ -1903,9 +1904,13 @@
 #ifndef __WIN__
 /***********************************************************************
 Does a synchronous read operation in Posix. */
+
+#define os_file_pread(file, buf, n, offset, offset_high)        \
+		_os_file_pread(file, buf, n, offset, offset_high, NULL);
+
 static
 ssize_t
-os_file_pread(
+_os_file_pread(
 /*==========*/
 				/* out: number of bytes read, -1 if error */
 	os_file_t	file,	/* in: handle to a file */
@@ -1913,12 +1918,17 @@
 	ulint		n,	/* in: number of bytes to read */	
 	ulint		offset,	/* in: least significant 32 bits of file
 				offset from where to read */
-	ulint		offset_high) /* in: most significant 32 bits of
-				offset */
+	ulint		offset_high, /* in: most significant 32 bits of
+				offset */
+        trx_t*		trx)
 {
         off_t	offs;
 	ssize_t	n_bytes;
-
+	ulint           sec;
+	ulint           ms;
+	ib_longlong     start_time;
+	ib_longlong     finish_time;
+	
 	ut_a((offset & 0xFFFFFFFFUL) == offset);
         
         /* If off_t is > 4 bytes in size, then we assume we can pass a
@@ -1937,7 +1947,13 @@
         }
 
 	os_n_file_reads++;
-
+	if (srv_slow_log && trx && trx->take_stats)
+	{
+	        trx->io_reads++;
+		trx->io_read += n;
+		ut_usectime(&sec, &ms);
+		start_time = (ib_longlong)sec * 1000000 + ms;
+	}
 #if defined(HAVE_PREAD) && !defined(HAVE_BROKEN_PREAD)
         os_mutex_enter(os_file_count_mutex);
 	os_file_n_pending_preads++;
@@ -1951,6 +1967,13 @@
 	os_n_pending_reads--;
         os_mutex_exit(os_file_count_mutex);
 
+        if (srv_slow_log && trx && trx->take_stats && start_time)
+        {
+		ut_usectime(&sec, &ms);
+        	finish_time = (ib_longlong)sec * 1000000 + ms;
+                trx->io_reads_wait_timer += (ulint)(finish_time - start_time);
+	}
+
 	return(n_bytes);
 #else
 	{
@@ -1980,6 +2003,13 @@
         os_mutex_enter(os_file_count_mutex);
 	os_n_pending_reads--;
         os_mutex_exit(os_file_count_mutex);
+
+        if (srv_slow_log && trx && trx->take_stats && start_time)
+        {
+		ut_usectime(&sec, &ms);
+        	finish_time = (ib_longlong)sec * 1000000 + ms;
+                trx->io_reads_wait_timer += (ulint)(finish_time - start_time);
+	}
 
 	return(ret);
 	}
@@ -2103,7 +2133,7 @@
 Requests a synchronous positioned read operation. */
 
 ibool
-os_file_read(
+_os_file_read(
 /*=========*/
 				/* out: TRUE if request was
 				successful, FALSE if fail */
@@ -2113,7 +2143,8 @@
 				offset where to read */
 	ulint		offset_high, /* in: most significant 32 bits of
 				offset */
-	ulint		n)	/* in: number of bytes to read */	
+	ulint		n,	/* in: number of bytes to read */
+        trx_t*		trx)
 {
 #ifdef __WIN__
 	BOOL		ret;
@@ -2177,7 +2208,7 @@
 	os_bytes_read_since_printout += n;
 
 try_again:
-	ret = os_file_pread(file, buf, n, offset, offset_high);
+	ret = _os_file_pread(file, buf, n, offset, offset_high, trx);
 
 	if ((ulint)ret == n) {
 
@@ -3137,7 +3168,8 @@
 				offset */
 	ulint		offset_high, /* in: most significant 32 bits of
 				offset */
-	ulint		len)	/* in: length of the block to read or write */
+	ulint		len,	/* in: length of the block to read or write */
+	trx_t*          trx)
 {
 	os_aio_slot_t*	slot;
 #ifdef WIN_ASYNC_IO
@@ -3390,7 +3422,8 @@
 				can be used to identify a completed aio
 				operation); if mode is OS_AIO_SYNC, these
 				are ignored */
-	void*		message2)
+	void*		message2,
+	trx_t*          trx)
 {
 	os_aio_array_t*	array;
 	os_aio_slot_t*	slot;
@@ -3429,8 +3462,8 @@
 		wait in the Windows case. */
 
 		if (type == OS_FILE_READ) {
-			return(os_file_read(file, buf, offset,
-							offset_high, n));
+			return(_os_file_read(file, buf, offset,
+							offset_high, n, trx));
 		}
 
 		ut_a(type == OS_FILE_WRITE);
@@ -3463,8 +3496,13 @@
 		ut_error;
 	}
 	
+	if (trx && type == OS_FILE_READ)
+	{
+		trx->io_reads++;
+		trx->io_read += n;
+	}
 	slot = os_aio_array_reserve_slot(type, array, message1, message2, file,
-					name, buf, offset, offset_high, n);
+					name, buf, offset, offset_high, n, trx);
 	if (type == OS_FILE_READ) {
 		if (os_aio_use_native_aio) {
 #ifdef WIN_ASYNC_IO
diff -r 25523be1816e innobase/srv/srv0srv.c
--- a/innobase/srv/srv0srv.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/srv/srv0srv.c	Mon Dec 22 00:26:39 2008 -0800
@@ -47,6 +47,8 @@
 #include "dict0boot.h"
 #include "srv0start.h"
 #include "row0mysql.h"
+
+ibool	srv_slow_log = 0;
 
 /* This is set to TRUE if the MySQL user has set it in MySQL; currently
 affects only FOREIGN KEY definition parsing */
@@ -996,6 +998,10 @@
 	ibool			has_slept = FALSE;
 	srv_conc_slot_t*	slot	  = NULL;
 	ulint			i;
+	ib_longlong             start_time = 0L;
+	ib_longlong             finish_time = 0L;
+	ulint                   sec;
+	ulint                   ms;
 
 	/* If trx has 'free tickets' to enter the engine left, then use one
 	such ticket */
@@ -1054,6 +1060,7 @@
     if (SRV_THREAD_SLEEP_DELAY > 0)
     {
       os_thread_sleep(SRV_THREAD_SLEEP_DELAY);
+      trx->innodb_que_wait_timer += SRV_THREAD_SLEEP_DELAY;
     }
 
 		trx->op_info = "";
@@ -1109,11 +1116,22 @@
 	/* Go to wait for the event; when a thread leaves InnoDB it will
 	release this thread */
 
+	if (srv_slow_log && trx->take_stats) {
+		ut_usectime(&sec, &ms);
+		start_time = (ib_longlong)sec * 1000000 + ms;
+	}
+
 	trx->op_info = "waiting in InnoDB queue";
 
 	os_event_wait(slot->event);
 
 	trx->op_info = "";
+
+	if (srv_slow_log && trx->take_stats && start_time) {
+		ut_usectime(&sec, &ms);
+		finish_time = (ib_longlong)sec * 1000000 + ms;
+		trx->innodb_que_wait_timer += (ulint)(finish_time - start_time);
+	}
 
 	os_fast_mutex_lock(&srv_conc_mutex);
 
diff -r 25523be1816e innobase/trx/trx0trx.c
--- a/innobase/trx/trx0trx.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/innobase/trx/trx0trx.c	Mon Dec 22 00:26:39 2008 -0800
@@ -190,6 +190,15 @@
 	trx->global_read_view_heap = mem_heap_create(256);
 	trx->global_read_view = NULL;
 	trx->read_view = NULL;
+	
+	trx->io_reads = 0;
+	trx->io_read = 0;
+	trx->io_reads_wait_timer = 0;
+	trx->lock_que_wait_timer = 0;
+	trx->innodb_que_wait_timer = 0;
+	trx->distinct_page_access = 0;
+	trx->distinct_page_access_hash = NULL;
+	trx->take_stats = FALSE;
 
 	/* Set X/Open XA transaction identification to NULL */
 	memset(&trx->xid, 0, sizeof(trx->xid));
@@ -230,6 +239,11 @@
 
 	trx->mysql_process_no = os_proc_get_number();
 	
+	if (srv_slow_log && trx->take_stats) {
+		trx->distinct_page_access_hash = mem_alloc(DPAH_SIZE);
+		memset(trx->distinct_page_access_hash, 0, DPAH_SIZE);
+	}
+
 	return(trx);
 }
 
@@ -366,6 +380,12 @@
 /*===============*/
 	trx_t*	trx)	/* in, own: trx object */
 {
+	if (trx->distinct_page_access_hash)
+	{
+		mem_free(trx->distinct_page_access_hash);
+		trx->distinct_page_access_hash= NULL;
+	}
+
 	thr_local_free(trx->mysql_thread_id);
 
 	mutex_enter(&kernel_mutex);
@@ -389,6 +409,12 @@
 /*====================*/
 	trx_t*	trx)	/* in, own: trx object */
 {
+	if (trx->distinct_page_access_hash)
+	{
+		mem_free(trx->distinct_page_access_hash);
+		trx->distinct_page_access_hash= NULL;
+	}
+
 	mutex_enter(&kernel_mutex);
 	
 	trx_free(trx);
@@ -1064,7 +1090,10 @@
 	trx_t*	trx)	/* in: transaction */
 {
 	que_thr_t*	thr;
-
+	ulint           sec;
+	ulint           ms;
+	ib_longlong     now;
+	
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(mutex_own(&kernel_mutex));
 #endif /* UNIV_SYNC_DEBUG */
@@ -1080,6 +1109,11 @@
 		thr = UT_LIST_GET_FIRST(trx->wait_thrs);
 	}
 
+	if (srv_slow_log && trx->take_stats) {
+		ut_usectime(&sec, &ms);
+		now = (ib_longlong)sec * 1000000 + ms;
+		trx->lock_que_wait_timer += (ulint)(now - trx->lock_que_wait_ustarted);
+	}
 	trx->que_state = TRX_QUE_RUNNING;
 }
 
@@ -1093,6 +1127,9 @@
 	trx_t*	trx)	/* in: transaction in the TRX_QUE_LOCK_WAIT state */
 {
 	que_thr_t*	thr;
+	ulint           sec;
+	ulint           ms;
+	ib_longlong     now;
 
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(mutex_own(&kernel_mutex));
@@ -1109,6 +1146,11 @@
 		thr = UT_LIST_GET_FIRST(trx->wait_thrs);
 	}
 
+	if (srv_slow_log && trx->take_stats) {
+		ut_usectime(&sec, &ms);
+		now = (ib_longlong)sec * 1000000 + ms;
+		trx->lock_que_wait_timer += (ulint)(now - trx->lock_que_wait_ustarted);
+	}
 	trx->que_state = TRX_QUE_RUNNING;
 }
 
diff -r 25523be1816e mysys/my_getopt.c
--- a/mysys/my_getopt.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/mysys/my_getopt.c	Mon Dec 22 00:26:39 2008 -0800
@@ -1061,6 +1061,9 @@
       case GET_ULONG:
 	printf("%lu\n", *((ulong*) value));
 	break;
+      case GET_DOUBLE:
+	printf("%6f\n", *((double*) value));
+	break;
       case GET_LL:
 	printf("%s\n", llstr(*((longlong*) value), buff));
 	break;
diff -r 25523be1816e patch_info/microslow_innodb.info
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/patch_info/microslow_innodb.info	Mon Dec 22 00:26:39 2008 -0800
@@ -0,0 +1,15 @@
+File=microslow_innodb.patch
+Name=Extended statistics in slow.log
+Version=1.1
+Author=Percona <info@percona.com>
+License=GPL
+Comment=
+Changelog
+2008-11-26
+YK: Fix inefficient determination of trx, Make not to call useless gettimeofday when don't use slow log. Make log_slow_queries dynamic (bool).
+
+2008-11-07
+VT: Moved log_slow_rate_limit in SHOW VARIABLE into right place
+
+2008-11
+Arjen Lentz: Fixups (backward compatibility) by Arjen Lentz <arjen@openquery.com.au>
diff -r 25523be1816e scripts/mysqldumpslow.sh
--- a/scripts/mysqldumpslow.sh	Mon Dec 22 00:25:06 2008 -0800
+++ b/scripts/mysqldumpslow.sh	Mon Dec 22 00:26:39 2008 -0800
@@ -83,8 +83,8 @@
     s/^#? Time: \d{6}\s+\d+:\d+:\d+.*\n//;
     my ($user,$host) = s/^#? User\@Host:\s+(\S+)\s+\@\s+(\S+).*\n// ? ($1,$2) : ('','');
 
-    s/^# Query_time: (\d+)  Lock_time: (\d+)  Rows_sent: (\d+).*\n//;
-    my ($t, $l, $r) = ($1, $2, $3);
+    s/^# Query_time: (\d+(\.\d+)?)  Lock_time: (\d+(\.\d+)?)  Rows_sent: (\d+(\.\d+)?).*\n//;
+    my ($t, $l, $r) = ($1, $3, $5);
     $t -= $l unless $opt{l};
 
     # remove fluff that mysqld writes to log when it (re)starts:
diff -r 25523be1816e sql-common/my_time.c
--- a/sql-common/my_time.c	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql-common/my_time.c	Mon Dec 22 00:26:39 2008 -0800
@@ -1252,3 +1252,37 @@
   return 0;
 }
 
+/*
+ int my_timer(ulonglong *ltime, ulonglong frequency)
+
+ For performance measurement this function returns the number
+ of microseconds since the epoch (SVr4, BSD 4.3, POSIX 1003.1-2001)
+ or system start (Windows platforms).
+
+ For windows platforms frequency value (obtained via 
+ QueryPerformanceFrequency) has to be specified. The global frequency
+ value is set in mysqld.cc. 
+
+ If Windows platform doesn't support QueryPerformanceFrequency we will
+ obtain the time via GetClockCount, which supports microseconds only.
+*/
+
+ulonglong my_timer(ulonglong *ltime, ulonglong frequency)
+{
+  ulonglong newtime= 0;
+#ifdef __WIN__
+  if (frequency) 
+  {
+    QueryPerformanceCounter((LARGE_INTEGER *)&newtime);
+    newtime/= (frequency * 1000000);
+  } else
+    newtime= (GetTickCount() * 1000; /* GetTickCount only returns milliseconds */
+#else
+  struct timeval t;
+  gettimeofday(&t, NULL);
+  newtime= (ulonglong)t.tv_sec * 1000000 + t.tv_usec;
+#endif
+  if (ltime)
+    *ltime= newtime;
+  return newtime;
+}
diff -r 25523be1816e sql/filesort.cc
--- a/sql/filesort.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/filesort.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -180,6 +180,7 @@
   {
     statistic_increment(thd->status_var.filesort_scan_count, &LOCK_status);
   }
+  thd->query_plan_flags|= QPLAN_FILESORT;
 #ifdef CAN_TRUST_RANGE
   if (select && select->quick && select->quick->records > 0L)
   {
@@ -245,6 +246,7 @@
   }
   else
   {
+    thd->query_plan_flags|= QPLAN_FILESORT_DISK;
     if (table_sort.buffpek && table_sort.buffpek_len < maxbuffer)
     {
       x_free(table_sort.buffpek);
@@ -1116,6 +1118,7 @@
 
   statistic_increment(current_thd->status_var.filesort_merge_passes,
 		      &LOCK_status);
+  current_thd->query_plan_fsort_passes++;
   if (param->not_killable)
   {
     killed= &not_killable;
diff -r 25523be1816e sql/ha_innodb.cc
--- a/sql/ha_innodb.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/ha_innodb.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -1,3 +1,4 @@
+
 /* Copyright (C) 2000-2005 MySQL AB & Innobase Oy
 
    This program is free software; you can redistribute it and/or modify
@@ -805,9 +806,34 @@
 		trx->check_unique_secondary = TRUE;
 	}
 
+	if (thd->variables.log_slow_verbosity & SLOG_V_INNODB) {
+		trx->take_stats = TRUE;
+	} else {
+		trx->take_stats = FALSE;
+	}
+
 	return(trx);
 }
 
+/*************************************************************************
+Gets current trx. */
+extern "C"
+trx_t*
+innobase_get_trx()
+{
+	THD *thd=current_thd;
+	if (likely(thd != 0)) {
+		return((trx_t*) thd->ha_data[innobase_hton.slot]);
+	} else {
+		return(NULL);
+	}
+}
+
+void
+innobase_update_var_slow_log()
+{
+	srv_slow_log = (ibool) opt_slow_log;
+}
 
 /*************************************************************************
 Construct ha_innobase handler. */
@@ -1309,6 +1335,8 @@
 	}
 
 	/* -------------- Log files ---------------------------*/
+
+	srv_slow_log = (ibool) opt_slow_log;
 
 	/* The default dir for log files is the datadir of MySQL */
 
@@ -4673,6 +4701,12 @@
 		trx->check_unique_secondary = FALSE;
 	}
 
+	if (thd->variables.log_slow_verbosity & SLOG_V_INNODB) {
+		trx->take_stats = TRUE;
+	} else {
+		trx->take_stats = FALSE;
+	}
+
 	if (lower_case_table_names) {
 		srv_lower_case_table_names = TRUE;
 	} else {
@@ -4938,6 +4972,12 @@
 		trx->check_unique_secondary = FALSE;
 	}
 
+	if (thd->variables.log_slow_verbosity & SLOG_V_INNODB) {
+		trx->take_stats = TRUE;
+	} else {
+		trx->take_stats = FALSE;
+	}
+
 	name_len = strlen(name);
 
 	assert(name_len < 1000);
@@ -5025,6 +5065,12 @@
 		trx->check_foreigns = FALSE;
 	}
 
+	if (current_thd->variables.log_slow_verbosity & SLOG_V_INNODB) {
+		trx->take_stats = TRUE;
+	} else {
+		trx->take_stats = FALSE;
+	}
+
   	error = row_drop_database_for_mysql(namebuf, trx);
 	my_free(namebuf, MYF(0));
 
@@ -5089,6 +5135,12 @@
 
 	if (current_thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
 		trx->check_foreigns = FALSE;
+	}
+
+	if (current_thd->variables.log_slow_verbosity & SLOG_V_INNODB) {
+		trx->take_stats = TRUE;
+	} else {
+		trx->take_stats = FALSE;
 	}
 
 	name_len1 = strlen(from);
@@ -6098,6 +6150,7 @@
 {
 	row_prebuilt_t* prebuilt = (row_prebuilt_t*) innobase_prebuilt;
 	trx_t*		trx;
+	int i;
 
   	DBUG_ENTER("ha_innobase::external_lock");
 	DBUG_PRINT("enter",("lock_type: %d", lock_type));
@@ -6221,7 +6274,24 @@
 
 	if (trx->n_mysql_tables_in_use == 0) {
 
-	        trx->mysql_n_tables_locked = 0;
+		current_thd->innodb_was_used = TRUE;
+		current_thd->innodb_io_reads += trx->io_reads;
+		current_thd->innodb_io_read += trx->io_read;
+		current_thd->innodb_io_reads_wait_timer += trx->io_reads_wait_timer;
+		current_thd->innodb_lock_que_wait_timer += trx->lock_que_wait_timer;
+		current_thd->innodb_innodb_que_wait_timer += trx->innodb_que_wait_timer;
+                current_thd->innodb_page_access += trx->distinct_page_access;
+
+		trx->io_reads = 0;
+		trx->io_read = 0;
+		trx->io_reads_wait_timer = 0;
+		trx->lock_que_wait_timer = 0;
+		trx->innodb_que_wait_timer = 0;
+		trx->distinct_page_access = 0;
+		if (trx->distinct_page_access_hash)
+			memset(trx->distinct_page_access_hash, 0, DPAH_SIZE);
+
+    		trx->mysql_n_tables_locked = 0;
 		prebuilt->used_in_HANDLER = FALSE;
 
 		if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))) {
diff -r 25523be1816e sql/ha_innodb.h
--- a/sql/ha_innodb.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/ha_innodb.h	Mon Dec 22 00:26:39 2008 -0800
@@ -266,6 +266,8 @@
 
 int innobase_start_trx_and_assign_read_view(THD* thd);
 
+void innobase_update_var_slow_log();
+
 /***********************************************************************
 This function is used to prepare X/Open XA distributed transaction   */
 
diff -r 25523be1816e sql/log.cc
--- a/sql/log.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/log.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -2229,11 +2229,12 @@
 */
 
 bool MYSQL_LOG::write(THD *thd,const char *query, uint query_length,
-		      time_t query_start_arg)
+		      time_t query_start_arg, ulonglong query_start_timer)
 {
   bool error=0;
   time_t current_time;
-  if (!is_open())
+  ulonglong current_timer;
+  if (!opt_slow_log || !is_open())
     return 0;
   DBUG_ENTER("MYSQL_LOG::write");
 
@@ -2243,7 +2244,8 @@
     int tmp_errno=0;
     char buff[80],*end;
     end=buff;
-    if (!(thd->options & OPTION_UPDATE_LOG))
+    if (!(thd->options & OPTION_UPDATE_LOG) &&
+        !(thd->slave_thread && opt_log_slow_slave_statements))
     {
       VOID(pthread_mutex_unlock(&LOCK_log));
       DBUG_RETURN(0);
@@ -2273,22 +2275,71 @@
       if (my_b_printf(&log_file, "# User@Host: %s[%s] @ %s [%s]\n",
                       sctx->priv_user ?
                       sctx->priv_user : "",
-                      sctx->user ? sctx->user : "",
+                      sctx->user ? sctx->user : (thd->slave_thread ? "SQL_SLAVE" : ""),
                       sctx->host ? sctx->host : "",
                       sctx->ip ? sctx->ip : "") ==
           (uint) -1)
         tmp_errno=errno;
     }
-    if (query_start_arg)
+    if (query_start_timer)
     {
+      char buf[5][20];
+      ulonglong current_timer= my_timer(&current_timer, frequency);
+      sprintf(buf[0], "%.6f", (current_timer - query_start_timer) / 1000000.0);
+      sprintf(buf[1], "%.6f", (thd->timer_after_lock - query_start_timer) / 1000000.0);
+      if (!query_length)
+      {
+        thd->sent_row_count= thd->examined_row_count= 0;
+        thd->innodb_was_used= FALSE;
+        thd->query_plan_flags= QPLAN_NONE;
+        thd->query_plan_fsort_passes= 0;
+      }
+
       /* For slow query log */
       if (my_b_printf(&log_file,
-                      "# Query_time: %lu  Lock_time: %lu  Rows_sent: %lu  Rows_examined: %lu\n",
-                      (ulong) (current_time - query_start_arg),
-                      (ulong) (thd->time_after_lock - query_start_arg),
+                      "# Thread_id: %lu  Schema: %s\n" \
+                      "# Query_time: %s  Lock_time: %s  Rows_sent: %lu  Rows_examined: %lu  Rows_affected: %lu  Rows_read: %lu\n", 
+                      (ulong) thd->thread_id, (thd->db ? thd->db : ""),
+                      buf[0], buf[1],
                       (ulong) thd->sent_row_count,
-                      (ulong) thd->examined_row_count) == (uint) -1)
+                      (ulong) thd->examined_row_count,
+                      ((long) thd->row_count_func > 0 ) ? (ulong) thd->row_count_func : 0,
+                      (ulong) thd->row_count) == (uint) -1)
         tmp_errno=errno;
+      if ((thd->variables.log_slow_verbosity & SLOG_V_QUERY_PLAN) &&
+           my_b_printf(&log_file,
+                      "# QC_Hit: %s  Full_scan: %s  Full_join: %s  Tmp_table: %s  Tmp_table_on_disk: %s\n" \
+                      "# Filesort: %s  Filesort_on_disk: %s  Merge_passes: %lu\n",
+                      ((thd->query_plan_flags & QPLAN_QC) ? "Yes" : "No"),
+                      ((thd->query_plan_flags & QPLAN_FULL_SCAN) ? "Yes" : "No"),
+                      ((thd->query_plan_flags & QPLAN_FULL_JOIN) ? "Yes" : "No"),
+                      ((thd->query_plan_flags & QPLAN_TMP_TABLE) ? "Yes" : "No"),
+                      ((thd->query_plan_flags & QPLAN_TMP_DISK) ? "Yes" : "No"),
+                      ((thd->query_plan_flags & QPLAN_FILESORT) ? "Yes" : "No"),
+                      ((thd->query_plan_flags & QPLAN_FILESORT_DISK) ? "Yes" : "No"),
+                      thd->query_plan_fsort_passes) == (uint) -1)
+        tmp_errno=errno;
+      if ((thd->variables.log_slow_verbosity & SLOG_V_INNODB) && thd->innodb_was_used)
+      {
+        sprintf(buf[2], "%.6f", thd->innodb_io_reads_wait_timer / 1000000.0);
+        sprintf(buf[3], "%.6f", thd->innodb_lock_que_wait_timer / 1000000.0);
+        sprintf(buf[4], "%.6f", thd->innodb_innodb_que_wait_timer / 1000000.0);
+        if (my_b_printf(&log_file,
+                        "#   InnoDB_IO_r_ops: %lu  InnoDB_IO_r_bytes: %lu  InnoDB_IO_r_wait: %s\n" \
+                        "#   InnoDB_rec_lock_wait: %s  InnoDB_queue_wait: %s\n" \
+                        "#   InnoDB_pages_distinct: %lu\n",
+                        (ulong) thd->innodb_io_reads,
+                        (ulong) thd->innodb_io_read,
+                        buf[2], buf[3], buf[4],
+                        (ulong) thd->innodb_page_access) == (uint) -1)
+          tmp_errno=errno;
+      } 
+      else
+      {
+        if ((thd->variables.log_slow_verbosity & SLOG_V_INNODB) &&
+            my_b_printf(&log_file,"# No InnoDB statistics available for this query\n") == (uint) -1)
+          tmp_errno=errno;
+      }
     }
     if (thd->db && strcmp(thd->db,db))
     {						// Database changed
diff -r 25523be1816e sql/log_event.cc
--- a/sql/log_event.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/log_event.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -2039,6 +2039,7 @@
       /* Execute the query (note that we bypass dispatch_command()) */
       const char* found_semicolon= NULL;
       mysql_parse(thd, thd->query, thd->query_length, &found_semicolon);
+      log_slow_statement(thd);
 
     }
     else
diff -r 25523be1816e sql/mysql_priv.h
--- a/sql/mysql_priv.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/mysql_priv.h	Mon Dec 22 00:26:39 2008 -0800
@@ -489,6 +489,78 @@
 #define WEEK_FIRST_WEEKDAY   4
 
 #define STRING_BUFFER_USUAL_SIZE 80
+
+/* Slow log */
+
+struct msl_opts
+{
+  ulong val;
+  const char *name;
+};
+
+#define SLOG_V_MICROTIME      1 << 0
+#define SLOG_V_QUERY_PLAN     1 << 1
+#define SLOG_V_INNODB         1 << 2
+/* ... */
+#define SLOG_V_INVALID        1 << 31
+#define SLOG_V_NONE           SLOG_V_MICROTIME
+
+static const struct msl_opts slog_verb[]= 
+{
+  /* Basic flags */
+
+  { SLOG_V_MICROTIME, "microtime" },
+  { SLOG_V_QUERY_PLAN, "query_plan" },
+  { SLOG_V_INNODB, "innodb" },
+
+  /* End of baisc flags */
+
+  { 0, "" },
+
+  /* Complex flags */
+
+  { SLOG_V_MICROTIME, "minimal" },
+  { SLOG_V_MICROTIME|SLOG_V_QUERY_PLAN, "standard" },
+  { SLOG_V_MICROTIME|SLOG_V_QUERY_PLAN|SLOG_V_INNODB, "full" },
+
+  /* End of complex flags */
+
+  { SLOG_V_INVALID, (char *)0 }
+};
+
+#define QPLAN_NONE            0
+#define QPLAN_QC              1 << 0
+#define QPLAN_QC_NO           1 << 1
+#define QPLAN_FULL_SCAN       1 << 2
+#define QPLAN_FULL_JOIN       1 << 3
+#define QPLAN_TMP_TABLE       1 << 4
+#define QPLAN_TMP_DISK        1 << 5
+#define QPLAN_FILESORT        1 << 6
+#define QPLAN_FILESORT_DISK   1 << 7
+/* ... */
+#define QPLAN_MAX             1 << 31
+
+#define SLOG_F_QC_NO          QPLAN_QC_NO
+#define SLOG_F_FULL_SCAN      QPLAN_FULL_SCAN
+#define SLOG_F_FULL_JOIN      QPLAN_FULL_JOIN
+#define SLOG_F_TMP_TABLE      QPLAN_TMP_TABLE
+#define SLOG_F_TMP_DISK       QPLAN_TMP_DISK
+#define SLOG_F_FILESORT       QPLAN_FILESORT
+#define SLOG_F_FILESORT_DISK  QPLAN_FILESORT_DISK
+#define SLOG_F_INVALID        1 << 31
+#define SLOG_F_NONE           0
+
+static const struct msl_opts slog_filter[]= 
+{
+  { SLOG_F_QC_NO,         "qc_miss" },
+  { SLOG_F_FULL_SCAN,     "full_scan" },
+  { SLOG_F_FULL_JOIN,     "full_join" },
+  { SLOG_F_TMP_TABLE,     "tmp_table" },
+  { SLOG_F_TMP_DISK,      "tmp_table_on_disk" },
+  { SLOG_F_FILESORT,      "filesort" },
+  { SLOG_F_FILESORT_DISK, "filesort_on_disk" },
+  { SLOG_F_INVALID,       (char *)0 }
+};
 
 enum enum_parsing_place
 {
@@ -1345,6 +1417,7 @@
 extern bool using_update_log, opt_large_files, server_id_supplied;
 extern bool opt_update_log, opt_bin_log, opt_error_log;
 extern my_bool opt_log, opt_slow_log, opt_log_queries_not_using_indexes;
+extern char *opt_slow_logname;
 extern bool opt_disable_networking, opt_skip_show_db;
 extern my_bool opt_character_set_client_handshake;
 extern bool volatile abort_loop, shutdown_in_progress, grant_option;
@@ -1356,7 +1429,7 @@
 extern my_bool opt_enable_named_pipe, opt_sync_frm, opt_allow_suspicious_udfs;
 extern my_bool opt_secure_auth;
 extern char* opt_secure_file_priv;
-extern my_bool opt_log_slow_admin_statements;
+extern my_bool opt_log_slow_admin_statements, opt_log_slow_slave_statements;
 extern my_bool sp_automatic_privileges, opt_noacl;
 extern my_bool opt_old_style_user_limits, trust_function_creators;
 extern uint opt_crash_binlog_innodb;
diff -r 25523be1816e sql/mysqld.cc
--- a/sql/mysqld.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/mysqld.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -175,7 +175,6 @@
 static void getvolumename();
 static void getvolumeID(BYTE *volumeName);
 #endif /* __NETWARE__ */
-
 
 #ifdef _AIX41
 int initgroups(const char *,unsigned int);
@@ -409,10 +408,12 @@
 my_bool opt_secure_auth= 0;
 char* opt_secure_file_priv= 0;
 my_bool opt_log_slow_admin_statements= 0;
+my_bool opt_log_slow_slave_statements= 0;
 my_bool lower_case_file_system= 0;
 my_bool opt_large_pages= 0;
 uint    opt_large_page_size= 0;
 my_bool opt_old_style_user_limits= 0, trust_function_creators= 0;
+char* opt_slow_logname= 0;
 /*
   True if there is at least one per-hour limit for some user, so we should
   check them before each query (and possibly reset counters when hour is
@@ -507,6 +508,7 @@
 Ge_creator ge_creator;
 Le_creator le_creator;
 
+ulonglong frequency= 0;
 
 FILE *bootstrap_file;
 int bootstrap_error;
@@ -584,7 +586,7 @@
 static int cleanup_done;
 static ulong opt_specialflag, opt_myisam_block_size;
 static char *opt_logname, *opt_update_logname, *opt_binlog_index_name;
-static char *opt_slow_logname, *opt_tc_heuristic_recover;
+static char *opt_tc_heuristic_recover;
 static char *mysql_home_ptr, *pidfile_name_ptr;
 static char **defaults_argv;
 static char *opt_bin_logname;
@@ -3655,6 +3657,8 @@
       unireg_abort(1);
     }
   }
+  if (!QueryPerformanceFrequency((LARGE_INTEGER *)&frequency))
+    frequency= 0;
 #endif /* __WIN__ */
 
   if (init_common_variables(MYSQL_CONFIG_NAME,
@@ -4901,7 +4905,7 @@
   OPT_INTERACTIVE_TIMEOUT, OPT_JOIN_BUFF_SIZE,
   OPT_KEY_BUFFER_SIZE, OPT_KEY_CACHE_BLOCK_SIZE,
   OPT_KEY_CACHE_DIVISION_LIMIT, OPT_KEY_CACHE_AGE_THRESHOLD,
-  OPT_LONG_QUERY_TIME,
+  OPT_LONG_QUERY_TIME, OPT_MIN_EXAMINED_ROW_LIMIT,
   OPT_LOWER_CASE_TABLE_NAMES, OPT_MAX_ALLOWED_PACKET,
   OPT_MAX_BINLOG_CACHE_SIZE, OPT_MAX_BINLOG_SIZE,
   OPT_MAX_CONNECTIONS, OPT_MAX_CONNECT_ERRORS,
@@ -4992,11 +4996,17 @@
   OPT_TIMED_MUTEXES,
   OPT_OLD_STYLE_USER_LIMITS,
   OPT_LOG_SLOW_ADMIN_STATEMENTS,
+  OPT_LOG_SLOW_SLAVE_STATEMENTS,
+  OPT_LOG_SLOW_RATE_LIMIT,
+  OPT_LOG_SLOW_VERBOSITY,
+  OPT_LOG_SLOW_FILTER,
   OPT_TABLE_LOCK_WAIT_TIMEOUT,
   OPT_PLUGIN_DIR,
   OPT_PORT_OPEN_TIMEOUT,
   OPT_MERGE,
   OPT_PROFILING,
+  OPT_SLOW_LOG,
+  OPT_SLOW_QUERY_LOG_FILE,
   OPT_INNODB_ROLLBACK_ON_TIMEOUT,
   OPT_SECURE_FILE_PRIV,
   OPT_KEEP_FILES_ON_CREATE,
@@ -5386,8 +5396,17 @@
    (gptr*) &opt_log_slow_admin_statements,
    (gptr*) &opt_log_slow_admin_statements,
    0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
+  {"log-slow-slave-statements", OPT_LOG_SLOW_SLAVE_STATEMENTS,
+   "Log slow replicated statements to the slow log if it is open.",
+   (gptr*) &opt_log_slow_slave_statements,
+   (gptr*) &opt_log_slow_slave_statements,
+   0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"log-slow-queries", OPT_SLOW_QUERY_LOG,
     "Log slow queries to this log file. Defaults logging to hostname-slow.log file. Must be enabled to activate other slow log options.",
+   (gptr*) &opt_slow_logname, (gptr*) &opt_slow_logname, 0, GET_STR, OPT_ARG,
+   0, 0, 0, 0, 0, 0},
+  {"slow_query_log_file", OPT_SLOW_QUERY_LOG_FILE,
+    "Log slow queries to given log file. Defaults logging to hostname-slow.log. Must be enabled to activate other slow log options.",
    (gptr*) &opt_slow_logname, (gptr*) &opt_slow_logname, 0, GET_STR, OPT_ARG,
    0, 0, 0, 0, 0, 0},
   {"log-tc", OPT_LOG_TC,
@@ -5753,6 +5772,9 @@
    "Tells the slave thread to continue replication when a query returns an error from the provided list.",
    0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif
+  {"slow-query-log", OPT_SLOW_LOG,
+   "Enable|disable slow query log", (gptr*) &opt_slow_log,
+   (gptr*) &opt_slow_log, 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0},
   {"socket", OPT_SOCKET, "Socket file to use for connection.",
    (gptr*) &mysqld_unix_port, (gptr*) &mysqld_unix_port, 0, GET_STR,
    REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
@@ -6055,11 +6077,27 @@
    (gptr*) 0,
    0, (GET_ULONG | GET_ASK_ADDR) , REQUIRED_ARG, 100,
    1, 100, 0, 1, 0},
-  {"long_query_time", OPT_LONG_QUERY_TIME,
-   "Log all queries that have taken more than long_query_time seconds to execute to file.",
-   (gptr*) &global_system_variables.long_query_time,
-   (gptr*) &max_system_variables.long_query_time, 0, GET_ULONG,
-   REQUIRED_ARG, 10, 1, LONG_TIMEOUT, 0, 1, 0},
+  {"log_slow_filter", OPT_LOG_SLOW_FILTER,
+    "Log only the queries that followed certain execution plan. Multiple flags allowed in a comma-separated string. [qc_miss, full_scan, full_join, tmp_table, tmp_table_on_disk, filesort, filesort_on_disk]",
+    0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, SLOG_F_NONE, 0, 0},
+  {"log_slow_rate_limit", OPT_LOG_SLOW_RATE_LIMIT,
+    "Rate limit statement writes to slow log to only those from every (1/log_slow_rate_limit) session.",
+    (gptr*) &global_system_variables.log_slow_rate_limit,
+    (gptr*) &max_system_variables.log_slow_rate_limit, 0, GET_ULONG,
+    REQUIRED_ARG, 1, 1, LONG_MAX, 0, 1L, 0},
+  {"log_slow_verbosity", OPT_LOG_SLOW_VERBOSITY,
+    "Choose how verbose the messages to your slow log will be. Multiple flags allowed in a comma-separated string. [microtime, query_plan, innodb]",
+    0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, SLOG_V_MICROTIME, 0, 0},
+   {"long_query_time", OPT_LONG_QUERY_TIME,
+    "Log all queries that have taken more than long_query_time seconds to execute to file.",
+    (gptr*) &global_system_variables.long_query_time,
+    (gptr*) &max_system_variables.long_query_time, 0, GET_DOUBLE,
+    REQUIRED_ARG, 10000000, 0, LONG_TIMEOUT * 1000000, 0, 1, 0},
+  {"min_examined_row_limit", OPT_MIN_EXAMINED_ROW_LIMIT,
+    "Don't log queries which examine less than min_examined_row_limit rows to file.",
+    (gptr*) &global_system_variables.min_examined_row_limit,
+    (gptr*) &max_system_variables.min_examined_row_limit, 0, GET_ULONG,
+    REQUIRED_ARG, 0, 0, LONG_MAX, 0, 1L, 0},
   {"lower_case_table_names", OPT_LOWER_CASE_TABLE_NAMES,
    "If set to 1 table names are stored in lowercase on disk and table names will be case-insensitive.  Should be set to 2 if you are using a case insensitive file system",
    (gptr*) &lower_case_table_names,
@@ -6835,7 +6873,11 @@
   global_system_variables.max_join_size= (ulonglong) HA_POS_ERROR;
   max_system_variables.max_join_size=   (ulonglong) HA_POS_ERROR;
   global_system_variables.old_passwords= 0;
-
+  global_system_variables.long_query_time = 10000000;
+  max_system_variables.long_query_time = LONG_TIMEOUT * 1000000;
+  global_system_variables.log_slow_verbosity= SLOG_V_MICROTIME;
+  global_system_variables.log_slow_filter= SLOG_F_NONE;
+  
   /*
     Default behavior for 4.1 and 5.0 is to treat NULL values as unequal
     when collecting index statistics for MyISAM tables.
@@ -7296,6 +7338,35 @@
   case OPT_BOOTSTRAP:
     opt_noacl=opt_bootstrap=1;
     break;
+  case OPT_LOG_SLOW_FILTER:
+    if ((global_system_variables.log_slow_filter= 
+          msl_flag_resolve_by_name(slog_filter, argument,
+                                   SLOG_F_NONE, SLOG_F_INVALID)) == SLOG_F_INVALID)
+    {
+      fprintf(stderr,"Invalid argument in log_slow_filter: %s\n", argument);
+      exit(1);
+    }
+    break;
+  case OPT_LOG_SLOW_VERBOSITY:
+    if ((global_system_variables.log_slow_verbosity= 
+         msl_flag_resolve_by_name(slog_verb, argument,
+                                  SLOG_V_NONE, SLOG_V_INVALID)) == SLOG_V_INVALID)
+    {
+      fprintf(stderr,"Invalid argument in log_slow_verbosity: %s\n", argument);
+      exit(1);
+    }
+    break;
+  case OPT_LONG_QUERY_TIME:
+  {
+    double doubleslow = strtod(argument,NULL);
+    if (doubleslow < 0 || doubleslow > (LONG_TIMEOUT))
+    {
+      fprintf(stderr,"Out of range long_query_time value: %s\n", argument);
+      exit(1);
+    }
+    global_system_variables.long_query_time = (ulonglong) (doubleslow * 1000000);
+    break;
+  }
   case OPT_STORAGE_ENGINE:
   {
     if ((enum db_type)((global_system_variables.table_type=
@@ -7628,10 +7699,14 @@
   if (opt_bdb)
     sql_print_warning("this binary does not contain BDB storage engine");
 #endif
-  if ((opt_log_slow_admin_statements || opt_log_queries_not_using_indexes) &&
+  if ((opt_log_slow_admin_statements || opt_log_queries_not_using_indexes ||
+        opt_log_slow_slave_statements) &&
       !opt_slow_log)
-    sql_print_warning("options --log-slow-admin-statements and --log-queries-not-using-indexes have no effect if --log-slow-queries is not set");
-
+  {
+    sql_print_warning("options --log-slow-admin-statements, --log-slow-slave-statements and --log-queries-not-using-indexes have no effect if --log-slow-queries is not set");
+    opt_log_slow_slave_statements= FALSE;
+  }
+  
   if (argc > 0)
   {
     fprintf(stderr, "%s: Too many arguments (first extra is '%s').\nUse --help to get a list of available options\n", my_progname, *argv);
diff -r 25523be1816e sql/set_var.cc
--- a/sql/set_var.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/set_var.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -217,9 +217,11 @@
   sys_log_queries_not_using_indexes("log_queries_not_using_indexes",
                                     &opt_log_queries_not_using_indexes);
 sys_var_thd_ulong	sys_log_warnings("log_warnings", &SV::log_warnings);
-sys_var_thd_ulong	sys_long_query_time("long_query_time",
+sys_var_thd_microtime  sys_long_query_time("long_query_time",
 					     &SV::long_query_time);
 sys_var_bool_const_ptr sys_log_slow("log_slow_queries", &opt_slow_log);
+sys_var_log_slow	sys_slow_query_log("slow_query_log", &opt_slow_log);
+sys_var_const_str_ptr	sys_slow_query_log_file("slow_query_log_file", &opt_slow_logname);
 sys_var_thd_bool	sys_low_priority_updates("low_priority_updates",
 						 &SV::low_priority_updates,
 						 fix_low_priority_updates);
@@ -283,6 +285,8 @@
 					   &SV::max_tmp_tables);
 sys_var_long_ptr	sys_max_write_lock_count("max_write_lock_count",
 						 &max_write_lock_count);
+sys_var_thd_ulong	sys_min_examined_row_limit("min_examined_row_limit",
+					     &SV::min_examined_row_limit);
 sys_var_thd_ulong       sys_multi_range_count("multi_range_count",
                                               &SV::multi_range_count);
 sys_var_long_ptr	sys_myisam_data_pointer_size("myisam_data_pointer_size",
@@ -327,6 +331,20 @@
 sys_var_bool_ptr	sys_relay_log_purge("relay_log_purge",
                                             &relay_log_purge);
 #endif
+sys_var_thd_ulong	sys_log_slow_rate_limit("log_slow_rate_limit",
+					     &SV::log_slow_rate_limit);
+sys_var_thd_msl_flag	sys_log_slow_filter("log_slow_filter",
+				       &SV::log_slow_filter,
+                                       SLOG_F_NONE,
+                                       SLOG_F_NONE,
+                                       SLOG_F_INVALID,
+                                       slog_filter);
+sys_var_thd_msl_flag	sys_log_slow_verbosity("log_slow_verbosity",
+				       &SV::log_slow_verbosity,
+                                       SLOG_V_NONE,
+                                       SLOG_V_MICROTIME,
+                                       SLOG_V_INVALID,
+                                       slog_verb);
 sys_var_long_ptr	sys_rpl_recovery_rank("rpl_recovery_rank",
 					      &rpl_recovery_rank);
 sys_var_long_ptr	sys_query_cache_size("query_cache_size",
@@ -694,6 +712,9 @@
   &sys_log_off,
   &sys_log_queries_not_using_indexes,
   &sys_log_slow,
+  &sys_log_slow_filter,
+  &sys_log_slow_rate_limit,
+  &sys_log_slow_verbosity,
   &sys_log_update,
   &sys_log_warnings,
   &sys_long_query_time,
@@ -717,6 +738,7 @@
   &sys_max_tmp_tables,
   &sys_max_user_connections,
   &sys_max_write_lock_count,
+  &sys_min_examined_row_limit,
   &sys_multi_range_count,
   &sys_myisam_data_pointer_size,
   &sys_myisam_max_sort_file_size,
@@ -770,6 +792,8 @@
   &sys_slave_skip_counter,
 #endif
   &sys_slow_launch_time,
+  &sys_slow_query_log,
+  &sys_slow_query_log_file,
   &sys_sort_buffer,
   &sys_sql_big_tables,
   &sys_sql_low_priority_updates,
@@ -986,8 +1010,11 @@
   {"log_slave_updates",       (char*) &opt_log_slave_updates,       SHOW_MY_BOOL},
 #endif
   {sys_log_slow.name,         (char*) &sys_log_slow,                SHOW_SYS},
+  {sys_log_slow_filter.name, (char*) &sys_log_slow_filter, SHOW_SYS},
+  {sys_log_slow_rate_limit.name, (char*) &sys_log_slow_rate_limit, SHOW_SYS},
+  {sys_log_slow_verbosity.name, (char*) &sys_log_slow_verbosity, SHOW_SYS},
   {sys_log_warnings.name,     (char*) &sys_log_warnings,	    SHOW_SYS},
-  {sys_long_query_time.name,  (char*) &sys_long_query_time, 	    SHOW_SYS},
+  {sys_long_query_time.name,  (char*) &sys_long_query_time, 	    SHOW_MICROTIME},
   {sys_low_priority_updates.name, (char*) &sys_low_priority_updates, SHOW_SYS},
   {"lower_case_file_system",  (char*) &lower_case_file_system,      SHOW_MY_BOOL},
   {"lower_case_table_names",  (char*) &lower_case_table_names,      SHOW_INT},
@@ -1014,6 +1041,7 @@
   {sys_max_tmp_tables.name,	(char*) &sys_max_tmp_tables,	    SHOW_SYS},
   {sys_max_user_connections.name,(char*) &sys_max_user_connections, SHOW_SYS},
   {sys_max_write_lock_count.name, (char*) &sys_max_write_lock_count,SHOW_SYS},
+  {sys_min_examined_row_limit.name, (char*) &sys_min_examined_row_limit, SHOW_SYS},
   {sys_multi_range_count.name,  (char*) &sys_multi_range_count,     SHOW_SYS},
   {sys_myisam_data_pointer_size.name, (char*) &sys_myisam_data_pointer_size, SHOW_SYS},
   {sys_myisam_max_sort_file_size.name, (char*) &sys_myisam_max_sort_file_size,
@@ -1101,6 +1129,8 @@
   {sys_slave_trans_retries.name,(char*) &sys_slave_trans_retries,   SHOW_SYS},
 #endif
   {sys_slow_launch_time.name, (char*) &sys_slow_launch_time,        SHOW_SYS},
+  {sys_slow_query_log.name,   (char*) &sys_slow_query_log,          SHOW_SYS},
+  {sys_slow_query_log_file.name,(char*) &sys_slow_query_log_file,   SHOW_SYS},
 #ifdef HAVE_SYS_UN_H
   {"socket",                  (char*) &mysqld_unix_port,             SHOW_CHAR_PTR},
 #endif
@@ -1769,6 +1799,17 @@
 }
 
 
+bool sys_var_thd_microtime::check(THD *thd, set_var *var)
+{
+  if (var->value->result_type() == DECIMAL_RESULT)
+    var->save_result.ulonglong_value= (ulonglong)(var->value->val_real() * 1000000);
+  else
+    var->save_result.ulonglong_value= (ulonglong)(var->value->val_int() * 1000000);
+
+  return 0;
+}
+
+
 bool sys_var_thd_bool::update(THD *thd,  set_var *var)
 {
   if (var->type == OPT_GLOBAL)
@@ -1924,6 +1965,19 @@
     value= *(longlong*) value_ptr(thd, var_type, base);
     pthread_mutex_unlock(&LOCK_global_system_variables);
     return new Item_int(value);
+  }
+  case SHOW_MICROTIME:
+  {
+    longlong value;
+    char buff[80];
+    int len;
+
+    pthread_mutex_lock(&LOCK_global_system_variables);
+    value= *(longlong*) value_ptr(thd, var_type, base);
+    pthread_mutex_unlock(&LOCK_global_system_variables);
+
+    len = snprintf(buff, 80, "%f", ((double) value) / 1000000.0);
+    return new Item_float(buff,len);
   }
   case SHOW_HA_ROWS:
   {
@@ -2757,6 +2811,30 @@
 }
 
 
+bool sys_var_log_slow::update(THD *thd, set_var *var)
+{
+  bool ret;
+
+  pthread_mutex_lock(&LOCK_global_system_variables);
+  if (var->save_result.ulong_value)
+  {
+    if(!mysql_slow_log.is_open())
+    {
+      mysql_slow_log.open_slow_log(opt_slow_logname);
+    }
+  }
+  pthread_mutex_unlock(&LOCK_global_system_variables);
+
+  ret = sys_var_bool_ptr::update(thd, var);
+
+#ifdef HAVE_INNOBASE_DB
+  innobase_update_var_slow_log();
+#endif
+
+  return(ret);
+}
+
+
 #ifdef HAVE_REPLICATION
 bool sys_var_slave_skip_counter::check(THD *thd, set_var *var)
 {
@@ -3519,6 +3597,191 @@
 #endif
 }
 
+/* Slow log stuff */
+
+ulong msl_option_resolve_by_name(const struct msl_opts *opts, const char *name, ulong len)
+{
+  ulong i;
+  
+  for (i=0; opts[i].name; i++)
+  {
+    if (!my_strnncoll(&my_charset_latin1,
+                      (const uchar *)name, len,
+                      (const uchar *)opts[i].name, strlen(opts[i].name)))
+      return opts[i].val;
+  }
+  return opts[i].val;
+}
+
+ulong msl_flag_resolve_by_name(const struct msl_opts *opts, const char *names_list, 
+                               const ulong none_val, const ulong invalid_val)
+{
+  const char *p, *e;
+  ulong val= none_val;
+  
+  if (!*names_list)
+    return val;
+  
+  for (p= e= names_list; ; e++)
+  {
+    ulong i;
+    
+    if (*e != ',' && *e)
+      continue;
+    for (i=0; opts[i].name; i++)
+    {
+      if (!my_strnncoll(&my_charset_latin1,
+                        (const uchar *)p, e - p,
+                        (const uchar *)opts[i].name, strlen(opts[i].name)))
+      {
+        val= val | opts[i].val;
+        break;
+      }
+    }
+    if (opts[i].val == invalid_val)
+      return invalid_val;
+    if (!*e)
+      break;
+    p= e + 1;
+  }
+  return val;
+}
+
+const char *msl_option_get_name(const struct msl_opts *opts, ulong val)
+{
+  for (ulong i=0; opts[i].name && opts[i].name[0]; i++)
+  {
+    if (opts[i].val == val)
+      return opts[i].name;
+  }
+  return "*INVALID*";
+}
+
+char *msl_flag_get_name(const struct msl_opts *opts, char *buf, ulong val)
+{
+  uint offset= 0;
+  
+  *buf= '\0';
+  for (ulong i=0; opts[i].name && opts[i].name[0]; i++)
+  {
+    if (opts[i].val & val)
+      offset+= snprintf(buf+offset, STRING_BUFFER_USUAL_SIZE - offset - 1,
+                        "%s%s", (offset ? "," : ""), opts[i].name);
+  }
+  return buf;
+}
+
+/****************************************************************************
+ Functions to handle log_slow_verbosity
+****************************************************************************/
+
+/* Based upon sys_var::check_enum() */
+
+bool sys_var_thd_msl_option::check(THD *thd, set_var *var)
+{
+  char buff[STRING_BUFFER_USUAL_SIZE];
+  String str(buff, sizeof(buff), &my_charset_latin1), *res;
+
+  if (var->value->result_type() == STRING_RESULT)
+  {
+    ulong verb= this->invalid_val;
+    if (!(res=var->value->val_str(&str)) ||
+	      (var->save_result.ulong_value=
+          (ulong) (verb= msl_option_resolve_by_name(this->opts, res->ptr(), res->length()))) == this->invalid_val)
+      goto err;
+    return 0;
+  }
+
+err:
+  my_error(ER_WRONG_ARGUMENTS, MYF(0), var->var->name);
+  return 1;
+}
+
+byte *sys_var_thd_msl_option::value_ptr(THD *thd, enum_var_type type,
+					LEX_STRING *base)
+{
+  ulong val;
+  val= ((type == OPT_GLOBAL) ? global_system_variables.*offset :
+        thd->variables.*offset);
+  const char *verbosity= msl_option_get_name(this->opts, val);
+  return (byte *) verbosity;
+}
+
+
+void sys_var_thd_msl_option::set_default(THD *thd, enum_var_type type)
+{
+  if (type == OPT_GLOBAL)
+    global_system_variables.*offset= (ulong) this->default_val;
+  else
+    thd->variables.*offset= (ulong) (global_system_variables.*offset);
+}
+
+
+bool sys_var_thd_msl_option::update(THD *thd, set_var *var)
+{
+  if (var->type == OPT_GLOBAL)
+    global_system_variables.*offset= var->save_result.ulong_value;
+  else
+    thd->variables.*offset= var->save_result.ulong_value;
+  return 0;
+}
+
+/****************************************************************************
+ Functions to handle log_slow_filter
+****************************************************************************/
+  
+/* Based upon sys_var::check_enum() */
+
+bool sys_var_thd_msl_flag::check(THD *thd, set_var *var)
+{
+  char buff[2 * STRING_BUFFER_USUAL_SIZE];
+  String str(buff, sizeof(buff), &my_charset_latin1), *res;
+
+  if (var->value->result_type() == STRING_RESULT)
+  {
+    ulong filter= this->none_val;
+    if (!(res=var->value->val_str(&str)) ||
+	 (var->save_result.ulong_value=
+          (ulong) (filter= msl_flag_resolve_by_name(this->flags, res->ptr(), this->none_val, 
+                                                    this->invalid_val))) == this->invalid_val)
+      goto err;
+    return 0;
+  }
+
+err:
+  my_error(ER_WRONG_ARGUMENTS, MYF(0), var->var->name);
+  return 1;
+}
+
+byte *sys_var_thd_msl_flag::value_ptr(THD *thd, enum_var_type type,
+					LEX_STRING *base)
+{
+  ulong val;
+  val= ((type == OPT_GLOBAL) ? global_system_variables.*offset :
+        thd->variables.*offset);
+  msl_flag_get_name(this->flags, this->flags_string, val);
+  return (byte *) this->flags_string;
+}
+
+
+void sys_var_thd_msl_flag::set_default(THD *thd, enum_var_type type)
+{
+  if (type == OPT_GLOBAL)
+    global_system_variables.*offset= (ulong) this->default_val;
+  else
+    thd->variables.*offset= (ulong) (global_system_variables.*offset);
+}
+
+
+bool sys_var_thd_msl_flag::update(THD *thd, set_var *var)
+{
+  if (var->type == OPT_GLOBAL)
+    global_system_variables.*offset= var->save_result.ulong_value;
+  else
+    thd->variables.*offset= var->save_result.ulong_value;
+  return 0;
+}
+
 /****************************************************************************
  Functions to handle table_type
 ****************************************************************************/
diff -r 25523be1816e sql/set_var.h
--- a/sql/set_var.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/set_var.h	Mon Dec 22 00:26:39 2008 -0800
@@ -132,6 +132,7 @@
 };
 
 
+
 class sys_var_ulonglong_ptr :public sys_var
 {
 public:
@@ -168,6 +169,13 @@
   bool check_update_type(Item_result type) { return 0; }
 };
 
+class sys_var_log_slow :public sys_var_bool_ptr
+{
+public:
+  sys_var_log_slow(const char *name_arg, my_bool *value_arg)
+    :sys_var_bool_ptr(name_arg, value_arg) {}
+  bool update(THD *thd, set_var *var);
+};
 
 class sys_var_bool_const_ptr : public sys_var
 {
@@ -340,7 +348,6 @@
   }
 };
 
-
 class sys_var_thd_ulong :public sys_var_thd
 {
   sys_check_func check_func;
@@ -360,7 +367,6 @@
   byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
 };
 
-
 class sys_var_thd_ha_rows :public sys_var_thd
 {
 public:
@@ -377,7 +383,6 @@
   SHOW_TYPE show_type() { return SHOW_HA_ROWS; }
   byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
 };
-
 
 class sys_var_thd_ulonglong :public sys_var_thd
 {
@@ -407,6 +412,19 @@
   }
 };
 
+class sys_var_thd_microtime :public sys_var_thd_ulonglong
+{
+public:
+  sys_var_thd_microtime(const char *name_arg, ulonglong SV::*offset_arg)
+    :sys_var_thd_ulonglong(name_arg, offset_arg)
+  {}
+  SHOW_TYPE show_type() { return SHOW_MICROTIME; }
+  bool check(THD *thd, set_var *var);
+  bool check_update_type(Item_result type)
+  {
+    return type != INT_RESULT && type != DECIMAL_RESULT;
+  }
+};
 
 class sys_var_thd_bool :public sys_var_thd
 {
@@ -477,6 +495,66 @@
                                             ulong *length);
 };
 
+
+class sys_var_thd_msl_option :public sys_var_thd
+{
+protected:
+  ulong SV::*offset;
+  const ulong none_val;
+  const ulong default_val;
+  const ulong invalid_val;
+  const struct msl_opts *opts;
+public:
+  sys_var_thd_msl_option(const char *name_arg, ulong SV::*offset_arg,
+                         const ulong none_val_arg,
+                         const ulong default_val_arg,
+                         const ulong invalid_val_arg,
+                         const struct msl_opts *opts_arg)
+    :sys_var_thd(name_arg), offset(offset_arg), none_val(none_val_arg),
+     default_val(default_val_arg), invalid_val(invalid_val_arg), 
+     opts(opts_arg)
+  {}
+  bool check(THD *thd, set_var *var);
+  SHOW_TYPE show_type() { return SHOW_CHAR; }
+  bool check_update_type(Item_result type)
+  {
+    return type != STRING_RESULT;		/* Only accept strings */
+  }
+  void set_default(THD *thd, enum_var_type type);
+  bool update(THD *thd, set_var *var);
+  byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
+};
+
+
+class sys_var_thd_msl_flag :public sys_var_thd
+{
+protected:
+  char flags_string[2 * STRING_BUFFER_USUAL_SIZE];
+  ulong SV::*offset;
+  const ulong none_val;
+  const ulong default_val;
+  const ulong invalid_val;
+  const struct msl_opts *flags;
+public:
+  sys_var_thd_msl_flag(const char *name_arg, ulong SV::*offset_arg, 
+                       const ulong none_val_arg, 
+                       const ulong default_val_arg, 
+                       const ulong invalid_val_arg,
+                       const struct msl_opts *flags_arg)
+    :sys_var_thd(name_arg), offset(offset_arg), none_val(none_val_arg),
+     default_val(default_val_arg), invalid_val(invalid_val_arg), 
+     flags(flags_arg)
+  {}
+  bool check(THD *thd, set_var *var);
+  SHOW_TYPE show_type() { return SHOW_CHAR; }
+  bool check_update_type(Item_result type)
+  {
+    return type != STRING_RESULT;		/* Only accept strings */
+  }
+  void set_default(THD *thd, enum_var_type type);
+  bool update(THD *thd, set_var *var);
+  byte *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
+};
 
 class sys_var_thd_storage_engine :public sys_var_thd
 {
@@ -1087,3 +1165,11 @@
 bool process_key_caches(int (* func) (const char *name, KEY_CACHE *));
 void delete_elements(I_List<NAMED_LIST> *list,
 		     void (*free_element)(const char*, gptr));
+
+/* Slow log functions */
+
+ulong msl_option_resolve_by_name(const struct msl_opts *opts, const char *name, ulong len);
+ulong msl_flag_resolve_by_name(const struct msl_opts *opts, const char *names_list, 
+                               const ulong none_val, const ulong invalid_val);
+const char *msl_option_get_name(const struct msl_opts *opts, ulong val);
+char *msl_flag_get_name(const struct msl_opts *opts, char *buf, ulong val);
diff -r 25523be1816e sql/slave.cc
--- a/sql/slave.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/slave.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -2925,6 +2925,12 @@
     + MAX_LOG_EVENT_HEADER;  /* note, incr over the global not session var */
   thd->slave_thread = 1;
   set_slave_thread_options(thd);
+  if (opt_log_slow_slave_statements)
+  {
+    thd->enable_slow_log= TRUE;
+    /* Slave thread is excluded from rate limiting the slow log writes. */
+    thd->write_to_slow_log= TRUE;
+  }
   thd->client_capabilities = CLIENT_LOCAL_FILES;
   thd->real_id=pthread_self();
   pthread_mutex_lock(&LOCK_thread_count);
diff -r 25523be1816e sql/sql_cache.cc
--- a/sql/sql_cache.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/sql_cache.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -1341,6 +1341,7 @@
 
   thd->limit_found_rows = query->found_rows();
   thd->status_var.last_query_cost= 0.0;
+  thd->query_plan_flags|= QPLAN_QC;
 
   BLOCK_UNLOCK_RD(query_block);
   DBUG_RETURN(1);				// Result sent to client
@@ -1348,6 +1349,7 @@
 err_unlock:
   STRUCT_UNLOCK(&structure_guard_mutex);
 err:
+  thd->query_plan_flags|= QPLAN_QC_NO;
   DBUG_RETURN(0);				// Query was not cached
 }
 
diff -r 25523be1816e sql/sql_class.cc
--- a/sql/sql_class.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/sql_class.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -188,7 +188,7 @@
    lock_id(&main_lock_id),
    user_time(0), in_sub_stmt(0), global_read_lock(0), is_fatal_error(0),
    transaction_rollback_request(0), is_fatal_sub_stmt_error(0),
-   rand_used(0), time_zone_used(0),
+   rand_used(0), time_zone_used(0), user_timer(0),
    last_insert_id_used(0), last_insert_id_used_bin_log(0), insert_id_used(0),
    clear_next_insert_id(0), in_lock_tables(0), bootstrap(0),
    derived_tables_processing(FALSE), spcont(NULL),
@@ -2224,6 +2224,12 @@
   backup->cuted_fields=     cuted_fields;
   backup->client_capabilities= client_capabilities;
   backup->savepoints= transaction.savepoints;
+  backup->innodb_io_reads= innodb_io_reads;
+  backup->innodb_io_read= innodb_io_read;
+  backup->innodb_io_reads_wait_timer= innodb_io_reads_wait_timer;
+  backup->innodb_lock_que_wait_timer= innodb_lock_que_wait_timer;
+  backup->innodb_innodb_que_wait_timer= innodb_innodb_que_wait_timer;
+  backup->innodb_page_access= innodb_page_access;
 
   if (!lex->requires_prelocking() || is_update_query(lex->sql_command))
     options&= ~OPTION_BIN_LOG;
@@ -2240,7 +2246,13 @@
   sent_row_count= 0;
   cuted_fields= 0;
   transaction.savepoints= 0;
-
+  innodb_io_reads= 0;
+  innodb_io_read= 0;
+  innodb_io_reads_wait_timer= 0;
+  innodb_lock_que_wait_timer= 0;
+  innodb_innodb_que_wait_timer= 0;
+  innodb_page_access= 0;
+  
   /* Surpress OK packets in case if we will execute statements */
   net.no_send_ok= TRUE;
 }
@@ -2293,6 +2305,12 @@
   */
   examined_row_count+= backup->examined_row_count;
   cuted_fields+=       backup->cuted_fields;
+  innodb_io_reads+= backup->innodb_io_reads;
+  innodb_io_read+= backup->innodb_io_read;
+  innodb_io_reads_wait_timer+= backup->innodb_io_reads_wait_timer;
+  innodb_lock_que_wait_timer+= backup->innodb_lock_que_wait_timer;
+  innodb_innodb_que_wait_timer+= backup->innodb_innodb_que_wait_timer;
+  innodb_page_access+= backup->innodb_page_access;
 }
 
 
diff -r ea2366a3ea79 sql/sql_class.h
--- a/sql/sql_class.h	Thu Dec 04 00:30:51 2008 -0800
+++ b/sql/sql_class.h	Thu Dec 04 00:32:56 2008 -0800
@@ -43,6 +43,7 @@
 extern char internal_table_name[2];
 extern char empty_c_string[1];
 extern const char **errmesg;
+extern ulonglong frequency;
 
 #define TC_LOG_PAGE_SIZE   8192
 #define TC_LOG_MIN_SIZE    (3*TC_LOG_PAGE_SIZE)
@@ -314,7 +321,7 @@
   bool write(THD *thd, enum enum_server_command command,
 	     const char *format, ...) ATTRIBUTE_FORMAT(printf, 4, 5);
   bool write(THD *thd, const char *query, uint query_length,
-	     time_t query_start=0);
+	     time_t query_start=0, ulonglong query_start_timer=0);
   bool write(Log_event* event_info); // binary log write
   bool write(THD *thd, IO_CACHE *cache, Log_event *commit_event);
 
@@ -520,13 +527,14 @@
   ulong auto_increment_increment, auto_increment_offset;
   ulong bulk_insert_buff_size;
   ulong join_buff_size;
-  ulong long_query_time;
+  ulonglong long_query_time;
   ulong max_allowed_packet;
   ulong max_error_count;
   ulong max_length_for_sort_data;
   ulong max_sort_length;
   ulong max_tmp_tables;
   ulong max_insert_delayed_threads;
+  ulong min_examined_row_limit;
   ulong multi_range_count;
   ulong myisam_repair_threads;
   ulong myisam_sort_buff_size;
@@ -542,10 +550,13 @@
   ulong preload_buff_size;
   ulong profiling_history_size;
   ulong query_cache_type;
+  ulong log_slow_rate_limit;
   ulong read_buff_size;
   ulong read_rnd_buff_size;
   ulong div_precincrement;
   ulong sortbuff_size;
+  ulong log_slow_filter;
+  ulong log_slow_verbosity;
   ulong table_type;
   ulong tx_isolation;
   ulong completion_type;
@@ -1121,6 +1132,12 @@
   uint in_sub_stmt;
   bool enable_slow_log, insert_id_used, clear_next_insert_id;
   bool last_insert_id_used;
+  ulong      innodb_io_reads;
+  ulonglong  innodb_io_read;
+  ulong      innodb_io_reads_wait_timer;
+  ulong      innodb_lock_que_wait_timer;
+  ulong      innodb_innodb_que_wait_timer;
+  ulong      innodb_page_access;
   my_bool no_send_ok;
   SAVEPOINT *savepoints;
 };
@@ -1177,6 +1194,11 @@
 class THD :public Statement,
            public Open_tables_state
 {
+private:
+  inline ulonglong query_start_timer() { return start_timer; }
+  inline void set_timer()    { if (user_timer) start_timer=timer_after_lock=user_timer; else timer_after_lock=my_timer(&start_timer, frequency); }
+  inline void end_timer()    { my_timer(&start_timer, frequency); }
+  inline void lock_timer()   { my_timer(&timer_after_lock, frequency); }
 public:
   /*
     Constant for THD::where initialization in the beginning of every query.
@@ -1285,10 +1307,24 @@
   */
   const char *where;
   time_t     start_time,time_after_lock,user_time;
+  ulonglong start_timer,timer_after_lock, user_timer;
   time_t     connect_time,thr_create_time; // track down slow pthread_create
   thr_lock_type update_lock_default;
   Delayed_insert *di;
 
+  bool       write_to_slow_log;
+
+  bool       innodb_was_used;
+  ulong      innodb_io_reads;
+  ulonglong  innodb_io_read;
+  ulong      innodb_io_reads_wait_timer;
+  ulong      innodb_lock_que_wait_timer;
+  ulong      innodb_innodb_que_wait_timer;
+  ulong      innodb_page_access;
+
+  ulong      query_plan_flags;
+  ulong      query_plan_fsort_passes;
+  
   /* <> 0 if we are inside of trigger or stored function. */
   uint in_sub_stmt;
 
@@ -1678,11 +1714,11 @@
       sql_print_information("time() failed with %d", errno);
   }
 
-  inline time_t query_start() { query_start_used=1; return start_time; }
-  inline void	set_time()    { if (user_time) start_time=time_after_lock=user_time; else { safe_time(&start_time); time_after_lock= start_time; }}
-  inline void	end_time()    { safe_time(&start_time); }
-  inline void	set_time(time_t t) { time_after_lock=start_time=user_time=t; }
-  inline void	lock_time()   { safe_time(&time_after_lock); }
+  inline time_t query_start() { query_start_timer(); query_start_used=1; return start_time; }
+  inline void set_time()    { set_timer(); if (user_time) start_time=time_after_lock=user_time; else { safe_time(&start_time); time_after_lock= start_time; }}
+  inline void	end_time()    { end_timer(); safe_time(&start_time); }
+  inline void	set_time(time_t t) { set_timer(); time_after_lock=start_time=user_time=t; }
+  inline void	lock_time()   { lock_timer(); safe_time(&time_after_lock); }
   inline void	insert_id(ulonglong id_arg)
   {
     last_insert_id= id_arg;
diff -r 25523be1816e sql/sql_parse.cc
--- a/sql/sql_parse.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/sql_parse.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -20,6 +20,7 @@
 #include <m_ctype.h>
 #include <myisam.h>
 #include <my_dir.h>
+#include <my_time.h>
 
 #ifdef HAVE_INNOBASE_DB
 #include "ha_innodb.h"
@@ -1227,6 +1228,15 @@
     my_net_set_read_timeout(net, thd->variables.net_read_timeout);
     my_net_set_write_timeout(net, thd->variables.net_write_timeout);
 
+    /*
+      If rate limiting of slow log writes is enabled, decide whether to log this
+      new thread's queries or not. Uses extremely simple algorithm. :)
+    */
+    thd->write_to_slow_log= FALSE;
+    if (thd->variables.log_slow_rate_limit <= 1 || 
+        (thd->thread_id % thd->variables.log_slow_rate_limit) == 0)
+         thd->write_to_slow_log= TRUE;
+
     while (!net->error && net->vio != 0 &&
            !(thd->killed == THD::KILL_CONNECTION))
     {
@@ -2353,27 +2363,53 @@
     return;                                     // Don't set time for sub stmt
 
   start_of_query= thd->start_time;
+  ulonglong start_of_query_timer= thd->start_timer;
   thd->end_time();				// Set start time
+
+
+  /* Follow the slow log filter configuration. */
+  if (thd->variables.log_slow_filter != SLOG_F_NONE && 
+      (!(thd->variables.log_slow_filter & thd->query_plan_flags) ||
+       ((thd->variables.log_slow_filter & SLOG_F_QC_NO) && 
+        (thd->query_plan_flags & QPLAN_QC))))
+    return;
+
+  /*
+    Low long_query_time value most likely means user is debugging stuff and even 
+    though some thread's queries are not supposed to be logged b/c of the rate 
+    limit, if one of them takes long enough (>= 1 second) it will be sensible 
+    to make an exception and write to slow log anyway.
+  */
+  if (thd->write_to_slow_log != TRUE && thd->variables.long_query_time < 1000000 &&
+      (ulong) (thd->start_timer - thd->timer_after_lock) >= 1000000)
+    thd->write_to_slow_log= TRUE;
+
+  /* Do not log this thread's queries due to rate limiting. */
+  if (thd->write_to_slow_log != TRUE)
+    return;
 
   /*
     Do not log administrative statements unless the appropriate option is
     set; do not log into slow log if reading from backup.
   */
-  if (thd->enable_slow_log && !thd->user_time)
+  if (thd->enable_slow_log &&
+      (!thd->user_time || (thd->slave_thread && opt_log_slow_slave_statements))
+     )
   {
     thd_proc_info(thd, "logging slow query");
 
-    if ((ulong) (thd->start_time - thd->time_after_lock) >
-	thd->variables.long_query_time ||
-        (thd->server_status &
-	  (SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED)) &&
-        opt_log_queries_not_using_indexes &&
-        /* == SQLCOM_END unless this is a SHOW command */
-        thd->lex->orig_sql_command == SQLCOM_END)
+    if (((ulong) (thd->start_timer - thd->timer_after_lock) >=
+         thd->variables.long_query_time ||
+         (thd->server_status &
+              (SERVER_QUERY_NO_INDEX_USED | SERVER_QUERY_NO_GOOD_INDEX_USED)) &&
+         opt_log_queries_not_using_indexes &&
+         /* == SQLCOM_END unless this is a SHOW command */
+         thd->lex->orig_sql_command == SQLCOM_END) &&
+        thd->examined_row_count >= thd->variables.min_examined_row_limit)
     {
       thd_proc_info(thd, "logging slow query");
       thd->status_var.long_query_count++;
-      mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query);
+      mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query, start_of_query_timer);
     }
   }
 }
@@ -6084,6 +6120,15 @@
     thd->total_warn_count=0;			// Warnings for this query
     thd->rand_used= 0;
     thd->sent_row_count= thd->examined_row_count= 0;
+    thd->innodb_was_used= FALSE;
+    thd->innodb_io_reads= 0;
+    thd->innodb_io_read= 0;
+    thd->innodb_io_reads_wait_timer= 0;
+    thd->innodb_lock_que_wait_timer= 0;
+    thd->innodb_innodb_que_wait_timer= 0;
+    thd->innodb_page_access= 0;
+    thd->query_plan_flags= QPLAN_NONE;
+    thd->query_plan_fsort_passes= 0;
   }
   DBUG_VOID_RETURN;
 }
diff -r 25523be1816e sql/sql_select.cc
--- a/sql/sql_select.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/sql_select.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -6221,8 +6221,11 @@
 	  {
 	    join->thd->server_status|=SERVER_QUERY_NO_INDEX_USED;
 	    if (statistics)
+	    {
 	      statistic_increment(join->thd->status_var.select_scan_count,
 				  &LOCK_status);
+				join->thd->query_plan_flags|= QPLAN_FULL_SCAN;
+      }
 	  }
 	}
 	else
@@ -6237,8 +6240,11 @@
 	  {
 	    join->thd->server_status|=SERVER_QUERY_NO_INDEX_USED;
 	    if (statistics)
+	    {
 	      statistic_increment(join->thd->status_var.select_full_join_count,
 				  &LOCK_status);
+				join->thd->query_plan_flags|= QPLAN_FULL_JOIN;
+      }
 	  }
 	}
 	if (!table->no_keyread)
@@ -9302,6 +9308,7 @@
 		      (ulong) rows_limit,test(group)));
 
   statistic_increment(thd->status_var.created_tmp_tables, &LOCK_status);
+  thd->query_plan_flags|= QPLAN_TMP_TABLE;
 
   if (use_temp_pool && !(test_flags & TEST_KEEP_TMP_TABLES))
     temp_pool_slot = bitmap_set_next(&temp_pool);
@@ -10162,6 +10169,7 @@
   }
   statistic_increment(table->in_use->status_var.created_tmp_disk_tables,
 		      &LOCK_status);
+	table->in_use->query_plan_flags|= QPLAN_TMP_DISK;
   table->s->db_record_offset= 1;
   DBUG_RETURN(0);
  err:
diff -r 25523be1816e sql/sql_show.cc
--- a/sql/sql_show.cc	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/sql_show.cc	Mon Dec 22 00:26:39 2008 -0800
@@ -1532,6 +1532,12 @@
           value= ((char *) status_var + (ulonglong) value);
         case SHOW_LONGLONG:
           end= longlong10_to_str(*(longlong*) value, buff, 10);
+          break;
+        case SHOW_MICROTIME:
+          show_type= ((sys_var*) value)->show_type();
+          value=     (char*) ((sys_var*) value)->value_ptr(thd, value_type,
+                                                           &null_lex_str);
+          end= buff + sprintf(buff, "%f", (((double) (*(ulonglong*)value))) / 1000000.0);
           break;
         case SHOW_HA_ROWS:
           end= longlong10_to_str((longlong) *(ha_rows*) value, buff, 10);
diff -r 25523be1816e sql/structs.h
--- a/sql/structs.h	Mon Dec 22 00:25:06 2008 -0800
+++ b/sql/structs.h	Mon Dec 22 00:26:39 2008 -0800
@@ -168,8 +168,8 @@
 enum SHOW_TYPE
 {
   SHOW_UNDEF,
-  SHOW_LONG, SHOW_LONGLONG, SHOW_INT, SHOW_CHAR, SHOW_CHAR_PTR, 
-  SHOW_DOUBLE_STATUS,
+  SHOW_LONG, SHOW_LONGLONG, SHOW_MICROTIME, SHOW_INT, SHOW_CHAR, SHOW_CHAR_PTR, 
+  SHOW_DOUBLE_STATUS, 
   SHOW_BOOL, SHOW_MY_BOOL, SHOW_OPENTABLES, SHOW_STARTTIME, 
   SHOW_LONG_CONST, SHOW_INT_CONST, SHOW_HAVE, SHOW_SYS, SHOW_HA_ROWS,
   SHOW_VARS,