diff options
Diffstat (limited to 'src/backend/access/transam/xlog.c')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index b9d0398b621..5c07795c8a9 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.162 2004/08/12 19:03:23 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.163 2004/08/23 23:22:44 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -4918,6 +4918,14 @@ CreateCheckPoint(bool shutdown, bool force) if (!shutdown) PreallocXlogFiles(recptr); + /* + * Truncate pg_subtrans if possible. We can throw away all data before + * the oldest XMIN of any running transaction. No future transaction will + * attempt to reference any pg_subtrans entry older than that (see Asserts + * in subtrans.c). + */ + TruncateSUBTRANS(GetOldestXmin(true)); + LWLockRelease(CheckpointLock); } |