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Make the world safe for full_page_writes. Allow XLOG records that try to

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update no-longer-existing pages to fall through as no-ops, but make a note
of each page number referenced by such records.  If we don't see a later
XLOG entry dropping the table or truncating away the page, complain at
the end of XLOG replay.  Since this fixes the known failure mode for
full_page_writes = off, revert my previous band-aid patch that disabled
that GUC variable.
This commit is contained in:
Tom Lane
2006-04-14 20:27:24 +00:00
parent 0fcc3c2f1d
commit defe93463c
4 changed files with 226 additions and 22 deletions
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6
src/backend/storage/smgr/smgr.c
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@@ -11,13 +11,14 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.98 2006/03/30 22:11:55 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.99 2006/04/14 20:27:24 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/xact.h"
#include "access/xlogutils.h"
#include "commands/tablespace.h"
#include "pgstat.h"
#include "storage/bufmgr.h"
@@ -942,6 +943,9 @@ smgr_redo(XLogRecPtr lsn, XLogRecord *record)
reln->smgr_rnode.dbNode,
reln->smgr_rnode.relNode,
xlrec->blkno)));
/* Also tell xlogutils.c about it */
XLogTruncateRelation(xlrec->rnode, xlrec->blkno);
}
else
elog(PANIC, "smgr_redo: unknown op code %u", info);