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Change default commit_delay to zero, update documentation.

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This commit is contained in:
Tom Lane
2001-02-18 04:50:43 +00:00
parent 33cc5d8a4d
commit 57e0847180
4 changed files with 24 additions and 16 deletions
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22
src/backend/access/transam/xact.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.96 2001/01/24 19:42:51 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.97 2001/02/18 04:50:43 tgl Exp $
*
* NOTES
* Transaction aborts can now occur two ways:
@ -221,7 +221,7 @@ int XactIsoLevel;
#include "access/xlogutils.h"
int CommitDelay = 5; /* 1/200000 sec */
int CommitDelay = 0; /* in microseconds */
static void (*_RollbackFunc)(void*) = NULL;
static void *_RollbackData = NULL;
@ -667,7 +667,6 @@ RecordTransactionCommit()
{
XLogRecData rdata;
xl_xact_commit xlrec;
struct timeval delay;
XLogRecPtr recptr;
BufmgrCommit();
@ -686,11 +685,20 @@ RecordTransactionCommit()
/*
* Sleep before commit! So we can flush more than one
* commit records per single fsync.
* commit records per single fsync. (The idea is some other
* backend may do the XLogFlush while we're sleeping. This
* needs work however, because on most Unixen, the minimum
* select() delay is 10msec or more, which is way too long.)
*/
delay.tv_sec = 0;
delay.tv_usec = CommitDelay;
(void) select(0, NULL, NULL, NULL, &delay);
if (CommitDelay > 0)
{
struct timeval delay;
delay.tv_sec = 0;
delay.tv_usec = CommitDelay;
(void) select(0, NULL, NULL, NULL, &delay);
}
XLogFlush(recptr);
MyLastRecPtr.xrecoff = 0;