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Introduce compact WAL record for the common case of commit (non-DDL).

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XLOG_XACT_COMMIT_COMPACT leaves out invalidation messages and relfilenodes,
saving considerable space for the vast majority of transaction commits.
XLOG_XACT_COMMIT keeps same definition as XLOG_PAGE_MAGIC 0xD067 and earlier.

Leonardo Francalanci and Simon Riggs
This commit is contained in:
Simon Riggs
2011-06-28 22:58:17 +01:00
parent 6f3efa76b0
commit 465883b0a2
4 changed files with 195 additions and 84 deletions
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11
src/backend/access/transam/xlog.c
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@ -5593,7 +5593,14 @@ recoveryStopsHere(XLogRecord *record, bool *includeThis)
if (record->xl_rmid != RM_XACT_ID && record->xl_rmid != RM_XLOG_ID)
return false;
record_info = record->xl_info & ~XLR_INFO_MASK;
if (record->xl_rmid == RM_XACT_ID && record_info == XLOG_XACT_COMMIT)
if (record->xl_rmid == RM_XACT_ID && record_info == XLOG_XACT_COMMIT_COMPACT)
{
xl_xact_commit_compact *recordXactCommitData;
recordXactCommitData = (xl_xact_commit_compact *) XLogRecGetData(record);
recordXtime = recordXactCommitData->xact_time;
}
else if (record->xl_rmid == RM_XACT_ID && record_info == XLOG_XACT_COMMIT)
{
xl_xact_commit *recordXactCommitData;
@ -5680,7 +5687,7 @@ recoveryStopsHere(XLogRecord *record, bool *includeThis)
recoveryStopTime = recordXtime;
recoveryStopAfter = *includeThis;
if (record_info == XLOG_XACT_COMMIT)
if (record_info == XLOG_XACT_COMMIT_COMPACT || record_info == XLOG_XACT_COMMIT)
{
if (recoveryStopAfter)
ereport(LOG,