diff options
Diffstat (limited to 'src/backend/access/transam/xlog.c')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index bf57b3bf49e..0944aa4162d 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -7637,6 +7637,16 @@ CreateCheckPoint(int flags) checkPoint.time = (pg_time_t) time(NULL); /* + * For Hot Standby, derive the oldestActiveXid before we fix the redo pointer. + * This allows us to begin accumulating changes to assemble our starting + * snapshot of locks and transactions. + */ + if (!shutdown && XLogStandbyInfoActive()) + checkPoint.oldestActiveXid = GetOldestActiveTransactionId(); + else + checkPoint.oldestActiveXid = InvalidTransactionId; + + /* * We must hold WALInsertLock while examining insert state to determine * the checkpoint REDO pointer. */ @@ -7822,9 +7832,7 @@ CreateCheckPoint(int flags) * Update checkPoint.nextXid since we have a later value */ if (!shutdown && XLogStandbyInfoActive()) - LogStandbySnapshot(&checkPoint.oldestActiveXid, &checkPoint.nextXid); - else - checkPoint.oldestActiveXid = InvalidTransactionId; + LogStandbySnapshot(&checkPoint.nextXid); START_CRIT_SECTION(); |