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Adjust index locking rules as per my proposal of earlier today. You

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now are supposed to take some kind of lock on an index whenever you
are going to access the index contents, rather than relying only on a
lock on the parent table.
This commit is contained in:
Tom Lane
2004-09-30 23:21:26 +00:00
parent d674884306
commit d2af5f8a3e
7 changed files with 74 additions and 46 deletions
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6
src/backend/commands/vacuumlazy.c
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@@ -31,7 +31,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.45 2004/08/29 05:06:41 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.46 2004/09/30 23:21:19 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -145,14 +145,14 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
vacrelstats->threshold = GetAvgFSMRequestSize(&onerel->rd_node);
/* Open all indexes of the relation */
vac_open_indexes(onerel, &nindexes, &Irel);
vac_open_indexes(onerel, ShareUpdateExclusiveLock, &nindexes, &Irel);
hasindex = (nindexes > 0);
/* Do the vacuuming */
lazy_scan_heap(onerel, vacrelstats, Irel, nindexes);
/* Done with indexes */
vac_close_indexes(nindexes, Irel);
vac_close_indexes(nindexes, Irel, NoLock);
/*
* Optionally truncate the relation.