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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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4
src/include/access/xlogutils.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xlogutils.h,v 1.20 2006/03/29 21:17:39 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/xlogutils.h,v 1.21 2006/04/14 20:27:24 tgl Exp $
*/
#ifndef XLOG_UTILS_H
#define XLOG_UTILS_H
@@ -16,11 +16,13 @@
extern void XLogInitRelationCache(void);
extern void XLogCheckInvalidPages(void);
extern void XLogCloseRelationCache(void);
extern Relation XLogOpenRelation(RelFileNode rnode);
extern void XLogDropRelation(RelFileNode rnode);
extern void XLogDropDatabase(Oid dbid);
extern void XLogTruncateRelation(RelFileNode rnode, BlockNumber nblocks);
extern Buffer XLogReadBuffer(Relation reln, BlockNumber blkno, bool init);