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Fix problems with loss of tuple commit status bits during WAL redo of
VACUUM FULL tuple moves. Store full-width t_infomask in WAL, rather than storing low 8 bits and expecting to be able to reconstruct upper bits. While at it, remove redundant t_oid field from WAL headers (the OID, if present, is now recorded in the data portion of the tuple). WAL version number bumped --- this does not force an initdb, you can instead run pg_resetxlog after a clean shutdown of the old postmaster.
This commit is contained in:
Tom Lane
parent
72f8efdc98
commit
c87469e64a
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.148 2002/09/04 20:31:09 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.149 2002/09/26 22:46:29 tgl Exp $
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*
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*
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* INTERFACE ROUTINES
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@ -1185,10 +1185,14 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
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rdata[0].len = SizeOfHeapInsert;
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rdata[0].next = &(rdata[1]);
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xlhdr.t_oid = HeapTupleGetOid(tup);
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xlhdr.t_natts = tup->t_data->t_natts;
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xlhdr.t_infomask = tup->t_data->t_infomask;
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xlhdr.t_hoff = tup->t_data->t_hoff;
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xlhdr.mask = tup->t_data->t_infomask;
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/*
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* note we mark rdata[1] as belonging to buffer; if XLogInsert
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* decides to write the whole page to the xlog, we don't need to
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* store xl_heap_header in the xlog.
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*/
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rdata[1].buffer = buffer;
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rdata[1].data = (char *) &xlhdr;
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rdata[1].len = SizeOfHeapHeader;
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@ -1200,7 +1204,11 @@ heap_insert(Relation relation, HeapTuple tup, CommandId cid)
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rdata[2].len = tup->t_len - offsetof(HeapTupleHeaderData, t_bits);
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rdata[2].next = NULL;
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/* If this is the single and first tuple on page... */
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/*
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* If this is the single and first tuple on page, we can reinit the
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* page instead of restoring the whole thing. Set flag, and hide
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* buffer references from XLogInsert.
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*/
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if (ItemPointerGetOffsetNumber(&(tup->t_self)) == FirstOffsetNumber &&
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PageGetMaxOffsetNumber(page) == FirstOffsetNumber)
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{
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@ -2041,11 +2049,10 @@ log_heap_update(Relation reln, Buffer oldbuf, ItemPointerData from,
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rdata[1].len = 0;
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rdata[1].next = &(rdata[2]);
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xlhdr.hdr.t_oid = HeapTupleGetOid(newtup);
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xlhdr.hdr.t_natts = newtup->t_data->t_natts;
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xlhdr.hdr.t_infomask = newtup->t_data->t_infomask;
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xlhdr.hdr.t_hoff = newtup->t_data->t_hoff;
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xlhdr.hdr.mask = newtup->t_data->t_infomask;
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if (move) /* remember xmin & xmax */
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if (move) /* remember xmax & xmin */
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{
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TransactionId xid[2]; /* xmax, xmin */
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@ -2060,6 +2067,10 @@ log_heap_update(Relation reln, Buffer oldbuf, ItemPointerData from,
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2 * sizeof(TransactionId));
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hsize += 2 * sizeof(TransactionId);
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}
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/*
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* As with insert records, we need not store the rdata[2] segment
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* if we decide to store the whole buffer instead.
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*/
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rdata[2].buffer = newbuf;
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rdata[2].data = (char *) &xlhdr;
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rdata[2].len = hsize;
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@ -2276,18 +2287,16 @@ heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
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htup = &tbuf.hdr;
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MemSet((char *) htup, 0, sizeof(HeapTupleHeaderData));
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/* PG73FORMAT: get bitmap [+ padding] [+ oid] + data */
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memcpy((char *) &tbuf + offsetof(HeapTupleHeaderData, t_bits),
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memcpy((char *) htup + offsetof(HeapTupleHeaderData, t_bits),
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(char *) xlrec + SizeOfHeapInsert + SizeOfHeapHeader,
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newlen);
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newlen += offsetof(HeapTupleHeaderData, t_bits);
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htup->t_natts = xlhdr.t_natts;
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htup->t_infomask = xlhdr.t_infomask;
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htup->t_hoff = xlhdr.t_hoff;
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htup->t_infomask = HEAP_XMAX_INVALID | xlhdr.mask;
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HeapTupleHeaderSetXmin(htup, record->xl_xid);
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HeapTupleHeaderSetCmin(htup, FirstCommandId);
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htup->t_ctid = xlrec->target.tid;
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if (reln->rd_rel->relhasoids)
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HeapTupleHeaderSetOid(htup, xlhdr.t_oid);
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offnum = PageAddItem(page, (Item) htup, newlen, offnum,
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LP_USED | OverwritePageMode);
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@ -2454,34 +2463,27 @@ newsame:;
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htup = &tbuf.hdr;
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MemSet((char *) htup, 0, sizeof(HeapTupleHeaderData));
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/* PG73FORMAT: get bitmap [+ padding] [+ oid] + data */
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memcpy((char *) &tbuf + offsetof(HeapTupleHeaderData, t_bits),
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memcpy((char *) htup + offsetof(HeapTupleHeaderData, t_bits),
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(char *) xlrec + hsize,
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newlen);
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newlen += offsetof(HeapTupleHeaderData, t_bits);
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htup->t_natts = xlhdr.t_natts;
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htup->t_infomask = xlhdr.t_infomask;
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htup->t_hoff = xlhdr.t_hoff;
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if (reln->rd_rel->relhasoids)
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HeapTupleHeaderSetOid(htup, xlhdr.t_oid);
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if (move)
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{
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TransactionId xid[2]; /* xmax, xmin */
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hsize = SizeOfHeapUpdate + SizeOfHeapHeader;
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memcpy((char *) xid,
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(char *) xlrec + hsize, 2 * sizeof(TransactionId));
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htup->t_infomask = xlhdr.mask;
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htup->t_infomask &= ~(HEAP_XMIN_COMMITTED |
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HEAP_XMIN_INVALID |
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HEAP_MOVED_OFF);
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htup->t_infomask |= HEAP_MOVED_IN;
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(char *) xlrec + SizeOfHeapUpdate + SizeOfHeapHeader,
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2 * sizeof(TransactionId));
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HeapTupleHeaderSetXmin(htup, xid[1]);
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HeapTupleHeaderSetXmax(htup, xid[0]);
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HeapTupleHeaderSetXvac(htup, record->xl_xid);
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}
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else
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{
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htup->t_infomask = HEAP_XMAX_INVALID | xlhdr.mask;
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HeapTupleHeaderSetXmin(htup, record->xl_xid);
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HeapTupleHeaderSetCmin(htup, FirstCommandId);
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}
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: htup.h,v 1.60 2002/09/04 20:31:37 momjian Exp $
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* $Id: htup.h,v 1.61 2002/09/26 22:46:29 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -261,6 +261,8 @@ do { \
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/*
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* WAL record definitions for heapam.c's WAL operations
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*
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* XLOG allows to store some information in high 4 bits of log
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* record xl_info field
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*/
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@ -300,15 +302,22 @@ typedef struct xl_heap_delete
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#define SizeOfHeapDelete (offsetof(xl_heap_delete, target) + SizeOfHeapTid)
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/*
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* We don't store the whole fixed part (HeapTupleHeaderData) of an inserted
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* or updated tuple in WAL; we can save a few bytes by reconstructing the
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* fields that are available elsewhere in the WAL record, or perhaps just
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* plain needn't be reconstructed. These are the fields we must store.
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* NOTE: t_hoff could be recomputed, but we may as well store it because
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* it will come for free due to alignment considerations.
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*/
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typedef struct xl_heap_header
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{
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Oid t_oid;
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int16 t_natts;
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uint16 t_infomask;
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uint8 t_hoff;
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uint8 mask; /* low 8 bits of t_infomask */
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} xl_heap_header;
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#define SizeOfHeapHeader (offsetof(xl_heap_header, mask) + sizeof(uint8))
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#define SizeOfHeapHeader (offsetof(xl_heap_header, t_hoff) + sizeof(uint8))
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/* This is what we need to know about insert */
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typedef struct xl_heap_insert
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@ -340,6 +349,8 @@ typedef struct xl_heap_clean
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#define SizeOfHeapClean (offsetof(xl_heap_clean, block) + sizeof(BlockNumber))
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/*
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* MaxTupleSize is the maximum allowed size of a tuple, including header and
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* MAXALIGN alignment padding. Basically it's BLCKSZ minus the other stuff
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@ -6,7 +6,7 @@
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* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: xlog.h,v 1.37 2002/09/04 20:31:37 momjian Exp $
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* $Id: xlog.h,v 1.38 2002/09/26 22:46:29 tgl Exp $
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*/
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#ifndef XLOG_H
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#define XLOG_H
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@ -110,7 +110,7 @@ typedef struct XLogContRecord
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/*
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* Each page of XLOG file has a header like this:
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*/
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#define XLOG_PAGE_MAGIC 0xD059 /* can be used as WAL version indicator */
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#define XLOG_PAGE_MAGIC 0xD05A /* can be used as WAL version indicator */
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typedef struct XLogPageHeaderData
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{
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