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Change memory-space accounting mechanism in tuplesort.c and tuplestore.c

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to make a reasonable attempt at accounting for palloc overhead, not just
the requested size of each memory chunk.  Since in many scenarios this
will make for a significant reduction in the amount of space acquired,
partially compensate by doubling the default value of SORT_MEM to 1Mb.
Per discussion in pgsql-general around 9-Jun-2002..
This commit is contained in:
Tom Lane
2002-08-12 00:36:12 +00:00
parent e44beef712
commit 77a7e9968b
10 changed files with 140 additions and 134 deletions
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5
src/include/utils/memutils.h
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@ -10,7 +10,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: memutils.h,v 1.46 2002/06/20 20:29:53 momjian Exp $
* $Id: memutils.h,v 1.47 2002/08/12 00:36:12 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -82,8 +82,11 @@ extern void MemoryContextDelete(MemoryContext context);
extern void MemoryContextResetChildren(MemoryContext context);
extern void MemoryContextDeleteChildren(MemoryContext context);
extern void MemoryContextResetAndDeleteChildren(MemoryContext context);
extern Size GetMemoryChunkSpace(void *pointer);
extern void MemoryContextStats(MemoryContext context);
#ifdef MEMORY_CONTEXT_CHECKING
extern void MemoryContextCheck(MemoryContext context);
#endif
extern bool MemoryContextContains(MemoryContext context, void *pointer);
/*