From 5472ed3e9bc23eff0b4e457fe564ac667cb69441 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Thu, 15 Sep 2016 11:23:25 -0400 Subject: [PATCH] Make min_parallel_relation_size's default value platform-independent. The documentation states that the default value is 8MB, but this was only true at BLCKSZ = 8kB, because the default was hard-coded as 1024. Make the code match the docs by computing the default as 8MB/BLCKSZ. Oversight in commit 75be66464, noted pursuant to a gripe from Peter E. Discussion: <90634e20-097a-e4fd-67d5-fb2c42f0dd71@2ndquadrant.com> --- src/backend/utils/misc/guc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c index c72bd6190a..ce4eef950b 100644 --- a/src/backend/utils/misc/guc.c +++ b/src/backend/utils/misc/guc.c @@ -2758,7 +2758,7 @@ static struct config_int ConfigureNamesInt[] = GUC_UNIT_BLOCKS, }, &min_parallel_relation_size, - 1024, 0, INT_MAX / 3, + (8 * 1024 * 1024) / BLCKSZ, 0, INT_MAX / 3, NULL, NULL, NULL },