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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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4
src/backend/utils/mmgr/mcxt.c
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@@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/mcxt.c,v 1.36 2002/11/13 00:37:06 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/mcxt.c,v 1.37 2002/12/15 21:01:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -80,7 +80,7 @@ MemoryContextInit(void)
*/
TopMemoryContext = AllocSetContextCreate((MemoryContext) NULL,
"TopMemoryContext",
8 * 1024,
0,
8 * 1024,
8 * 1024);