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Change the timestamps recorded in transaction commit/abort xlog records

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from time_t to TimestampTz representation.  This provides full gettimeofday()
resolution of the timestamps, which might be useful when attempting to
do point-in-time recovery --- previously it was not possible to specify
the stop point with sub-second resolution.  But mostly this is to get
rid of TimestampTz-to-time_t conversion overhead during commit.  Per my
proposal of a day or two back.
This commit is contained in:
Tom Lane
2007-04-30 21:01:53 +00:00
parent 641912b4d1
commit c432061963
7 changed files with 67 additions and 42 deletions
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18
src/backend/access/transam/xact.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.241 2007/04/30 03:23:48 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.242 2007/04/30 21:01:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -773,7 +773,7 @@ RecordTransactionCommit(void)
MyProc->inCommit = true;
SetCurrentTransactionStopTimestamp();
xlrec.xtime = timestamptz_to_time_t(xactStopTimestamp);
xlrec.xact_time = xactStopTimestamp;
xlrec.nrels = nrels;
xlrec.nsubxacts = nchildren;
rdata[0].data = (char *) (&xlrec);
@ -1069,7 +1069,7 @@ RecordTransactionAbort(void)
XLogRecPtr recptr;
SetCurrentTransactionStopTimestamp();
xlrec.xtime = timestamptz_to_time_t(xactStopTimestamp);
xlrec.xact_time = xactStopTimestamp;
xlrec.nrels = nrels;
xlrec.nsubxacts = nchildren;
rdata[0].data = (char *) (&xlrec);
@ -1247,7 +1247,7 @@ RecordSubTransactionAbort(void)
xl_xact_abort xlrec;
XLogRecPtr recptr;
xlrec.xtime = time(NULL);
xlrec.xact_time = GetCurrentTimestamp();
xlrec.nrels = nrels;
xlrec.nsubxacts = nchildren;
rdata[0].data = (char *) (&xlrec);
@ -4282,12 +4282,9 @@ xact_redo(XLogRecPtr lsn, XLogRecord *record)
static void
xact_desc_commit(StringInfo buf, xl_xact_commit *xlrec)
{
struct tm *tm = localtime(&xlrec->xtime);
int i;
appendStringInfo(buf, "%04u-%02u-%02u %02u:%02u:%02u",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
appendStringInfoString(buf, timestamptz_to_str(xlrec->xact_time));
if (xlrec->nrels > 0)
{
appendStringInfo(buf, "; rels:");
@ -4313,12 +4310,9 @@ xact_desc_commit(StringInfo buf, xl_xact_commit *xlrec)
static void
xact_desc_abort(StringInfo buf, xl_xact_abort *xlrec)
{
struct tm *tm = localtime(&xlrec->xtime);
int i;
appendStringInfo(buf, "%04u-%02u-%02u %02u:%02u:%02u",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
appendStringInfoString(buf, timestamptz_to_str(xlrec->xact_time));
if (xlrec->nrels > 0)
{
appendStringInfo(buf, "; rels:");