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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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src/backend/utils/misc/postgresql.conf.sample
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@ -57,7 +57,7 @@
#
# Non-shared Memory Sizes
#
#sort_mem = 512 # min 32
#sort_mem = 1024 # min 64
#vacuum_mem = 8192 # min 1024