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Reduce hash size for compute_array_stats, compute_tsvector_stats.

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The size is only a hint, but a big hint chews up a lot of memory without
apparently improving performance much.

Analysis and patch by Noah Misch.
This commit is contained in:
Robert Haas 2012-04-23 22:05:41 -04:00
parent 9d435d57e1
commit 85efd5f065
2 changed files with 2 additions and 2 deletions
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2
src/backend/tsearch/ts_typanalyze.c
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@ -186,7 +186,7 @@ compute_tsvector_stats(VacAttrStats *stats,
hash_ctl.match = lexeme_match; hash_ctl.match = lexeme_match;
hash_ctl.hcxt = CurrentMemoryContext; hash_ctl.hcxt = CurrentMemoryContext;
lexemes_tab = hash_create("Analyzed lexemes table", lexemes_tab = hash_create("Analyzed lexemes table",
bucket_width * 7, num_mcelem,
&hash_ctl, &hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_COMPARE | HASH_CONTEXT); HASH_ELEM | HASH_FUNCTION | HASH_COMPARE | HASH_CONTEXT);

2
src/backend/utils/adt/array_typanalyze.c
View File

@ -282,7 +282,7 @@ compute_array_stats(VacAttrStats *stats, AnalyzeAttrFetchFunc fetchfunc,
elem_hash_ctl.match = element_match; elem_hash_ctl.match = element_match;
elem_hash_ctl.hcxt = CurrentMemoryContext; elem_hash_ctl.hcxt = CurrentMemoryContext;
elements_tab = hash_create("Analyzed elements table", elements_tab = hash_create("Analyzed elements table",
bucket_width * 7, num_mcelem,
&elem_hash_ctl, &elem_hash_ctl,
HASH_ELEM | HASH_FUNCTION | HASH_COMPARE | HASH_CONTEXT); HASH_ELEM | HASH_FUNCTION | HASH_COMPARE | HASH_CONTEXT);