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Reduce the default size of the local lock hash table. There's usually

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no need for it to be nearly as big as the global hash table, and since
it's not in shared memory it can grow if it does need to be bigger.
By reducing the size, we speed up hash_seq_search(), which saves a
significant fraction of subtransaction entry/exit overhead.
This commit is contained in:
Tom Lane 2004-11-20 20:16:54 +00:00
parent 193a97c2d3
commit 8ecbc46bdb
1 changed files with 2 additions and 2 deletions
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4
src/backend/storage/lmgr/lock.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.143 2004/10/25 00:46:41 neilc Exp $ * $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.144 2004/11/20 20:16:54 tgl Exp $
* *
* NOTES * NOTES
* Outside modules can create a lock table and acquire/release * Outside modules can create a lock table and acquire/release
@ -331,7 +331,7 @@ LockMethodTableInit(const char *tabName,
sprintf(shmemName, "%s (locallock hash)", tabName); sprintf(shmemName, "%s (locallock hash)", tabName);
LockMethodLocalHash[lockmethodid] = hash_create(shmemName, LockMethodLocalHash[lockmethodid] = hash_create(shmemName,
init_table_size, 128,
&info, &info,
hash_flags); hash_flags);