diff options
| author | Tom Lane | 2004-08-22 02:41:58 +0000 |
|---|---|---|
| committer | Tom Lane | 2004-08-22 02:41:58 +0000 |
| commit | f009c316ba49857249611bc0d578c518c449879e (patch) | |
| tree | 4fbab4d7068969dced2e698735407b1ffca38075 /src/include/access | |
| parent | 37d937ea2c062093887e6aa03879166b6db06900 (diff) | |
Tweak code so that pg_subtrans is never consulted for XIDs older than
RecentXmin (== MyProc->xmin). This ensures that it will be safe to
truncate pg_subtrans at RecentGlobalXmin, which should largely eliminate
any fear of bloat. Along the way, eliminate SubTransXidsHaveCommonAncestor,
which isn't really needed and could not give a trustworthy result anyway
under the lookback restriction.
In an unrelated but nearby change, #ifdef out GetUndoRecPtr, which has
been dead code since 2001 and seems unlikely to ever be resurrected.
Diffstat (limited to 'src/include/access')
| -rw-r--r-- | src/include/access/subtrans.h | 3 | ||||
| -rw-r--r-- | src/include/access/xlog.h | 7 |
2 files changed, 2 insertions, 8 deletions
diff --git a/src/include/access/subtrans.h b/src/include/access/subtrans.h index 2c601752d12..bf6cec64ec7 100644 --- a/src/include/access/subtrans.h +++ b/src/include/access/subtrans.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/subtrans.h,v 1.1 2004/07/01 00:51:38 tgl Exp $ + * $PostgreSQL: pgsql/src/include/access/subtrans.h,v 1.2 2004/08/22 02:41:58 tgl Exp $ */ #ifndef SUBTRANS_H #define SUBTRANS_H @@ -20,7 +20,6 @@ extern void SubTransSetParent(TransactionId xid, TransactionId parent); extern TransactionId SubTransGetParent(TransactionId xid); extern TransactionId SubTransGetTopmostTransaction(TransactionId xid); -extern bool SubTransXidsHaveCommonAncestor(TransactionId xid1, TransactionId xid2); extern int SUBTRANSShmemSize(void); extern void SUBTRANSShmemInit(void); diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h index f2542d6fc71..ef33ae72158 100644 --- a/src/include/access/xlog.h +++ b/src/include/access/xlog.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.54 2004/07/21 22:31:25 tgl Exp $ + * $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.55 2004/08/22 02:41:58 tgl Exp $ */ #ifndef XLOG_H #define XLOG_H @@ -135,9 +135,4 @@ extern void CreateCheckPoint(bool shutdown, bool force); extern void XLogPutNextOid(Oid nextOid); extern XLogRecPtr GetRedoRecPtr(void); -/* in storage/ipc/sinval.c, but don't want to declare in sinval.h because - * we'd have to include xlog.h into that ... - */ -extern XLogRecPtr GetUndoRecPtr(void); - #endif /* XLOG_H */ |