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More fixes for 8.4 DTrace probes. Remove useless BUFFER_HIT/BUFFER_MISS

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probes --- the BUFFER_READ_DONE probe provides the same information and more
besides.  Expand the LOCK_WAIT_START/DONE probe arguments so that there's
actually some chance of telling what is being waited for.  Update and
clean up the documentation.
This commit is contained in:
Tom Lane
2009-03-23 01:52:38 +00:00
parent c242e6b6d4
commit 471913a6a5
5 changed files with 296 additions and 221 deletions
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16
src/backend/storage/buffer/bufmgr.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.248 2009/03/22 22:39:05 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.249 2009/03/23 01:52:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -272,14 +272,7 @@ ReadBuffer_common(SMgrRelation smgr, bool isLocalBuf, ForkNumber forkNum,
ReadLocalBufferCount++;
bufHdr = LocalBufferAlloc(smgr, forkNum, blockNum, &found);
if (found)
{
LocalBufferHitCount++;
TRACE_POSTGRESQL_BUFFER_HIT(true); /* true = local buffer */
}
else
{
TRACE_POSTGRESQL_BUFFER_MISS(true); /* ditto */
}
}
else
{
@ -291,14 +284,7 @@ ReadBuffer_common(SMgrRelation smgr, bool isLocalBuf, ForkNumber forkNum,
*/
bufHdr = BufferAlloc(smgr, forkNum, blockNum, strategy, &found);
if (found)
{
BufferHitCount++;
TRACE_POSTGRESQL_BUFFER_HIT(false); /* false = shared buffer */
}
else
{
TRACE_POSTGRESQL_BUFFER_MISS(false); /* ditto */
}
}
/* At this point we do NOT hold any locks. */

16
src/backend/storage/lmgr/lock.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.186 2009/01/01 17:23:47 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.187 2009/03/23 01:52:38 tgl Exp $
*
* NOTES
* A lock table is a shared memory hash table. When
@ -787,11 +787,21 @@ LockAcquire(const LOCKTAG *locktag,
* Sleep till someone wakes me up.
*/
TRACE_POSTGRESQL_LOCK_WAIT_START(locktag->locktag_field2, lockmode);
TRACE_POSTGRESQL_LOCK_WAIT_START(locktag->locktag_field1,
locktag->locktag_field2,
locktag->locktag_field3,
locktag->locktag_field4,
locktag->locktag_type,
lockmode);
WaitOnLock(locallock, owner);
TRACE_POSTGRESQL_LOCK_WAIT_DONE(locktag->locktag_field2, lockmode);
TRACE_POSTGRESQL_LOCK_WAIT_DONE(locktag->locktag_field1,
locktag->locktag_field2,
locktag->locktag_field3,
locktag->locktag_field4,
locktag->locktag_type,
lockmode);
/*
* NOTE: do not do any material change of state between here and