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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)