GUC: adjust effective_cache_size SQL descriptions

Follow on patch for commit 3e0f1a4741f564c1a2fa6e944729d6967355d8c7.

Reported-by: Peter Eisentraut
Discussion: https://postgr.es/m/369ec766-b947-51bd-4dad-6fb9e026439f@2ndquadrant.com

Backpatch-through: 9.4

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index e471d7f53cdbb77500944f6a62c9ac7da57e9d56..ce54828fbb8fb7d7d512ba46c2cd5255ba1c79ae 100644 (file)
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -2987,8 +2987,8 @@ 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 data cache."),
-                       gettext_noop("That is, the size of the cache used for PostgreSQL data files. "
+                       gettext_noop("Sets the planner's assumption about the total size of the data caches."),
+                       gettext_noop("That is, the total size of the caches (kernel cache and shared buffers) used for PostgreSQL data files. "
                                                 "This is measured in disk pages, which are normally 8 kB each."),
                        GUC_UNIT_BLOCKS,
                },