database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-21 10:42:50 +03:00
Code Activity

Move the tuple freezing point in CLUSTER to a point further back in the past,

Browse Source 
to avoid losing useful Xid information in not-so-old tuples.  This makes
CLUSTER behave the same as VACUUM as far a tuple-freezing behavior goes
(though CLUSTER does not yet advance the table's relfrozenxid).

While at it, move the actual freezing operation in rewriteheap.c to a more
appropriate place, and document it thoroughly.  This part of the patch from
Tom Lane.
This commit is contained in:
Alvaro Herrera
2007-05-17 15:28:29 +00:00
parent 90cbc63fd1
commit 3b0347b36e
6 changed files with 44 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/include/commands/vacuum.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/commands/vacuum.h,v 1.70 2007/03/13 00:33:43 tgl Exp $
* $PostgreSQL: pgsql/src/include/commands/vacuum.h,v 1.71 2007/05/17 15:28:29 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@@ -119,7 +119,7 @@ extern void vac_update_relstats(Oid relid,
double num_tuples,
bool hasindex,
TransactionId frozenxid);
extern void vacuum_set_xid_limits(VacuumStmt *vacstmt, bool sharedRel,
extern void vacuum_set_xid_limits(int freeze_min_age, bool sharedRel,
TransactionId *oldestXmin,
TransactionId *freezeLimit);
extern void vac_update_datfrozenxid(void);