From 0007490e0964d194a606ba79bb11ae1642da3372 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Sat, 20 Aug 2005 23:26:37 +0000 Subject: Convert the arithmetic for shared memory size calculation from 'int' to 'Size' (that is, size_t), and install overflow detection checks in it. This allows us to remove the former arbitrary restrictions on NBuffers etc. It won't make any difference in a 32-bit machine, but in a 64-bit machine you could theoretically have terabytes of shared buffers. (How efficiently we could manage 'em remains to be seen.) Similarly, num_temp_buffers, work_mem, and maintenance_work_mem can be set above 2Gb on a 64-bit machine. Original patch from Koichi Suzuki, additional work by moi. --- src/include/storage/freespace.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/include/storage/freespace.h') diff --git a/src/include/storage/freespace.h b/src/include/storage/freespace.h index fe6cca76bc..1ce7b7f08a 100644 --- a/src/include/storage/freespace.h +++ b/src/include/storage/freespace.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/storage/freespace.h,v 1.17 2004/12/31 22:03:42 pgsql Exp $ + * $PostgreSQL: pgsql/src/include/storage/freespace.h,v 1.18 2005/08/20 23:26:33 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -37,7 +37,7 @@ extern int MaxFSMPages; * function prototypes */ extern void InitFreeSpaceMap(void); -extern int FreeSpaceShmemSize(void); +extern Size FreeSpaceShmemSize(void); extern BlockNumber GetPageWithFreeSpace(RelFileNode *rel, Size spaceNeeded); extern BlockNumber RecordAndGetPageWithFreeSpace(RelFileNode *rel, -- cgit v1.2.1