database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-15 19:21:59 +03:00
Code Activity

Derive latestRemovedXid for btree deletes by reading heap pages. The

Browse Source 
WAL record for btree delete contains a list of tids, even when backup
blocks are present. We follow the tids to their heap tuples, taking
care to follow LP_REDIRECT tuples. We ignore LP_DEAD tuples on the
understanding that they will always have xmin/xmax earlier than any
LP_NORMAL tuples referred to by killed index tuples. Iff all tuples
are LP_DEAD we return InvalidTransactionId. The heap relfilenode is
added to the WAL record, requiring API changes to pass down the heap
Relation. XLOG_PAGE_MAGIC updated.
This commit is contained in:
Simon Riggs
2010-03-28 09:27:02 +00:00
parent 59292f28ca
commit a760893dbd
6 changed files with 254 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/backend/access/nbtree/nbtree.c
View File

@ -12,7 +12,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.176 2010/02/26 02:00:34 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.177 2010/03/28 09:27:01 sriggs Exp $
*
*-------------------------------------------------------------------------
*/
@ -708,7 +708,7 @@ btvacuumscan(IndexVacuumInfo *info, IndexBulkDeleteResult *stats,
buf = ReadBufferExtended(rel, MAIN_FORKNUM, num_pages - 1, RBM_NORMAL,
info->strategy);
LockBufferForCleanup(buf);
_bt_delitems(rel, buf, NULL, 0, true, vstate.lastBlockVacuumed);
_bt_delitems_vacuum(rel, buf, NULL, 0, vstate.lastBlockVacuumed);
_bt_relbuf(rel, buf);
}
@ -889,7 +889,7 @@ restart:
{
BlockNumber lastBlockVacuumed = BufferGetBlockNumber(buf);
_bt_delitems(rel, buf, deletable, ndeletable, true, vstate->lastBlockVacuumed);
_bt_delitems_vacuum(rel, buf, deletable, ndeletable, vstate->lastBlockVacuumed);
/*
* Keep track of the block number of the lastBlockVacuumed, so we