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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-20 23:26:37 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-20 23:26:37 +0000 |
| commit | 0007490e0964d194a606ba79bb11ae1642da3372 (patch) | |
| tree | 91db8ec49d812ba2c4307fcf858dfb7fd3890819 /src/include/storage/freespace.h | |
| parent | 2299ceab1cc5e141431f19eaf70c30f0d84eb28b (diff) | |
| download | postgresql-0007490e0964d194a606ba79bb11ae1642da3372.tar.gz | |
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.
Diffstat (limited to 'src/include/storage/freespace.h')
| -rw-r--r-- | src/include/storage/freespace.h | 4 |
1 files changed, 2 insertions, 2 deletions
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, |