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Arrange to preallocate all required space for the buffer and FSM hash

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tables in shared memory.  This ensures that overflow of the lock table
creates no long-lasting problems.  Per discussion with Merlin Moncure.
This commit is contained in:
Tom Lane
2004-09-28 20:46:37 +00:00
parent d9b68c8061
commit 3a246cc285
6 changed files with 42 additions and 18 deletions
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6
src/include/storage/shmem.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/shmem.h,v 1.42 2004/08/29 04:13:10 momjian Exp $
* $PostgreSQL: pgsql/src/include/storage/shmem.h,v 1.43 2004/09/28 20:46:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -73,8 +73,8 @@ extern void *ShmemInitStruct(const char *name, Size size, bool *foundPtr);
/* size constants for the shmem index table */
/* max size of data structure string name */
#define SHMEM_INDEX_KEYSIZE (48)
/* maximum size of the shmem index table */
#define SHMEM_INDEX_SIZE (100)
/* max size of the shmem index table (not a hard limit) */
#define SHMEM_INDEX_SIZE (32)
/* this is a hash bucket in the shmem index table */
typedef struct