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Arrange to fsync two-phase-commit state files only during checkpoints;

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given reasonably short lifespans for prepared transactions, this should
mean that only a small minority of state files ever need to be fsynced
at all.  Per discussion with Heikki Linnakangas.
This commit is contained in:
Tom Lane
2005-06-19 20:00:39 +00:00
parent ba90268e2b
commit e26b0abda3
4 changed files with 197 additions and 58 deletions
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4
src/backend/access/transam/xlog.c
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@ -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/backend/access/transam/xlog.c,v 1.201 2005/06/17 22:32:43 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.202 2005/06/19 20:00:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -5110,6 +5110,8 @@ CreateCheckPoint(bool shutdown, bool force)
CheckPointSUBTRANS();
CheckPointMultiXact();
FlushBufferPool();
/* We deliberately delay 2PC checkpointing as long as possible */
CheckPointTwoPhase(checkPoint.redo);
START_CRIT_SECTION();