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Tweak default memory context allocation policy so that a context is not

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given any malloc block until something is first allocated in it; but
thereafter, MemoryContextReset won't release that first malloc block.
This preserves the quick-reset property of the original policy, without
forcing 8K to be allocated to every context whether any of it is ever
used or not.  Also, remove some more no-longer-needed explicit freeing
during ExecEndPlan.
This commit is contained in:
Tom Lane
2002-12-15 21:01:34 +00:00
parent 5bab36e9f6
commit e64c7feb2f
11 changed files with 66 additions and 99 deletions
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20
src/backend/utils/cache/relcache.c vendored
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.181 2002/11/15 17:18:49 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.182 2002/12/15 21:01:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -647,9 +647,9 @@ RelationBuildRuleLock(Relation relation)
*/
rulescxt = AllocSetContextCreate(CacheMemoryContext,
RelationGetRelationName(relation),
0, /* minsize */
1024, /* initsize */
1024); /* maxsize */
ALLOCSET_SMALL_MINSIZE,
ALLOCSET_SMALL_INITSIZE,
ALLOCSET_SMALL_MAXSIZE);
relation->rd_rulescxt = rulescxt;
/*
@ -994,9 +994,9 @@ RelationInitIndexAccessInfo(Relation relation)
*/
indexcxt = AllocSetContextCreate(CacheMemoryContext,
RelationGetRelationName(relation),
0, /* minsize */
512, /* initsize */
1024); /* maxsize */
ALLOCSET_SMALL_MINSIZE,
ALLOCSET_SMALL_INITSIZE,
ALLOCSET_SMALL_MAXSIZE);
relation->rd_indexcxt = indexcxt;
/*
@ -2851,9 +2851,9 @@ load_relcache_init_file(void)
*/
indexcxt = AllocSetContextCreate(CacheMemoryContext,
RelationGetRelationName(rel),
0, /* minsize */
512, /* initsize */
1024); /* maxsize */
ALLOCSET_SMALL_MINSIZE,
ALLOCSET_SMALL_INITSIZE,
ALLOCSET_SMALL_MAXSIZE);
rel->rd_indexcxt = indexcxt;
/* next, read the index strategy map */