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Cost based vacuum delay feature.

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Jan
This commit is contained in:
Jan Wieck
2004-02-06 19:36:18 +00:00
parent 687d7cf355
commit f425b605f4
9 changed files with 189 additions and 8 deletions
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8
src/backend/storage/buffer/bufmgr.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.155 2004/02/04 01:24:53 wieck Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.156 2004/02/06 19:36:18 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -576,6 +576,12 @@ write_buffer(Buffer buffer, bool release)
LWLockAcquire(BufMgrLock, LW_EXCLUSIVE);
Assert(bufHdr->refcount > 0);
/*
* If the buffer is not dirty yet, do vacuum cost accounting.
*/
if (!(bufHdr->flags & BM_DIRTY) && VacuumCostActive)
VacuumCostBalance += VacuumCostPageDirty;
bufHdr->flags |= (BM_DIRTY | BM_JUST_DIRTIED);
if (release)

11
src/backend/storage/buffer/freelist.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/freelist.c,v 1.39 2004/01/15 16:14:26 wieck Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/freelist.c,v 1.40 2004/02/06 19:36:18 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -31,6 +31,7 @@
#include "storage/ipc.h"
#include "storage/proc.h"
#include "access/xact.h"
#include "miscadmin.h"
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
@@ -237,6 +238,12 @@ StrategyBufferLookup(BufferTag *tagPtr, bool recheck)
strategy_get_from = STRAT_LIST_T2;
}
/*
* Do the cost accounting for vacuum
*/
if (VacuumCostActive)
VacuumCostBalance += VacuumCostPageMiss;
/* report cache miss */
return NULL;
}
@@ -250,6 +257,8 @@ StrategyBufferLookup(BufferTag *tagPtr, bool recheck)
* Count hits
*/
StrategyControl->num_hit[cdb->list]++;
if (VacuumCostActive)
VacuumCostBalance += VacuumCostPageHit;
/*
* If this is a T2 hit, we simply move the CDB to the