From 1336bd9862c15db20a879f27082d18604fec7093 Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Thu, 15 Sep 2016 09:22:52 -0400 Subject: [PATCH] pg_buffercache: Allow huge allocations. Otherwise, users who have configured shared_buffers >= 256GB won't be able to use this module. There probably aren't many of those, but it doesn't hurt anything to fix it so that it works. Backpatch to 9.4, where MemoryContextAllocHuge was introduced. The same problem exists in older branches, but there's no easy way to fix it there. KaiGai Kohei --- contrib/pg_buffercache/pg_buffercache_pages.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/contrib/pg_buffercache/pg_buffercache_pages.c b/contrib/pg_buffercache/pg_buffercache_pages.c index f39fe255db6..5323269aa59 100644 --- a/contrib/pg_buffercache/pg_buffercache_pages.c +++ b/contrib/pg_buffercache/pg_buffercache_pages.c @@ -98,7 +98,9 @@ pg_buffercache_pages(PG_FUNCTION_ARGS) fctx->tupdesc = BlessTupleDesc(tupledesc); /* Allocate NBuffers worth of BufferCachePagesRec records. */ - fctx->record = (BufferCachePagesRec *) palloc(sizeof(BufferCachePagesRec) * NBuffers); + fctx->record = (BufferCachePagesRec *) + MemoryContextAllocHuge(CurrentMemoryContext, + sizeof(BufferCachePagesRec) * NBuffers); /* Set max calls and remember the user function context. */ funcctx->max_calls = NBuffers;