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GUC: adjust effective_cache_size docs and SQL description

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Clarify that effective_cache_size is both kernel buffers and shared
buffers.

Reported-by: nat@makarevitch.org

Discussion: https://postgr.es/m/153685164808.22334.15432535018443165207@wrigleys.postgresql.org

Backpatch-through: 9.3
This commit is contained in:
Bruce Momjian
2018-11-02 09:11:00 -04:00
parent 0083a82433
commit 3e0f1a4741
2 changed files with 5 additions and 5 deletions
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7
src/backend/utils/misc/guc.c
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@ -2987,10 +2987,9 @@ static struct config_int ConfigureNamesInt[] =
{
{"effective_cache_size", PGC_USERSET, QUERY_TUNING_COST,
gettext_noop("Sets the planner's assumption about the size of the disk cache."),
gettext_noop("That is, the portion of the kernel's disk cache that "
"will be used for PostgreSQL data files. This is measured in disk "
"pages, which are normally 8 kB each."),
gettext_noop("Sets the planner's assumption about the size of the data cache."),
gettext_noop("That is, the size of the cache used for PostgreSQL data files. "
"This is measured in disk pages, which are normally 8 kB each."),
GUC_UNIT_BLOCKS,
},
&effective_cache_size,