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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/nodes/memnodes.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: memnodes.h,v 1.24 2002/06/20 20:29:50 momjian Exp $
* $Id: memnodes.h,v 1.25 2002/08/12 00:36:12 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -42,10 +42,11 @@ typedef struct MemoryContextMethods
void (*init) (MemoryContext context);
void (*reset) (MemoryContext context);
void (*delete) (MemoryContext context);
Size (*get_chunk_space) (MemoryContext context, void *pointer);
void (*stats) (MemoryContext context);
#ifdef MEMORY_CONTEXT_CHECKING
void (*check) (MemoryContext context);
#endif
void (*stats) (MemoryContext context);
} MemoryContextMethods;