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Reduce default value of max_prepared_transactions from 50 to 5. This

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saves nearly 700kB in the default shared memory segment size, which seems
worthwhile, and it is a feature that many users won't use anyway.  Per
Heikki's argument, there is no point in a compromise value --- those who
are using 2PC at all will probably want it at least equal to max_connections.
But we can't set it to zero by default without breaking the prepared_xacts
regression test.
This commit is contained in:
Tom Lane
2005-08-29 21:38:18 +00:00
parent 8aec77fb9f
commit 037709e0b3
4 changed files with 7 additions and 7 deletions
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4
src/backend/access/transam/twophase.c
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.10 2005/08/20 23:26:10 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.11 2005/08/29 21:38:18 tgl Exp $
*
* NOTES
* Each global transaction is associated with a global transaction
@@ -64,7 +64,7 @@
#define TWOPHASE_DIR "pg_twophase"
/* GUC variable, can't be changed after startup */
int max_prepared_xacts = 50;
int max_prepared_xacts = 5;
/*
* This struct describes one global transaction that is in prepared state