From 15c121b3ed7eb2f290e19533e41ccca734d23574 Mon Sep 17 00:00:00 2001 From: Heikki Linnakangas Date: Tue, 30 Sep 2008 10:52:14 +0000 Subject: Rewrite the FSM. Instead of relying on a fixed-size shared memory segment, the free space information is stored in a dedicated FSM relation fork, with each relation (except for hash indexes; they don't use FSM). This eliminates the max_fsm_relations and max_fsm_pages GUC options; remove any trace of them from the backend, initdb, and documentation. Rewrite contrib/pg_freespacemap to match the new FSM implementation. Also introduce a new variant of the get_raw_page(regclass, int4, int4) function in contrib/pageinspect that let's you to return pages from any relation fork, and a new fsm_page_contents() function to inspect the new FSM pages. --- src/backend/access/gist/gist.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'src/backend/access/gist/gist.c') diff --git a/src/backend/access/gist/gist.c b/src/backend/access/gist/gist.c index 7dd981a490b..2f75c3fa2a3 100644 --- a/src/backend/access/gist/gist.c +++ b/src/backend/access/gist/gist.c @@ -8,7 +8,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.151 2008/06/12 09:12:29 heikki Exp $ + * $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.152 2008/09/30 10:52:10 heikki Exp $ * *------------------------------------------------------------------------- */ @@ -19,6 +19,7 @@ #include "catalog/index.h" #include "miscadmin.h" #include "storage/bufmgr.h" +#include "storage/indexfsm.h" #include "utils/memutils.h" const XLogRecPtr XLogRecPtrForTemp = {1, 1}; @@ -102,6 +103,9 @@ gistbuild(PG_FUNCTION_ARGS) elog(ERROR, "index \"%s\" already contains data", RelationGetRelationName(index)); + /* Initialize FSM */ + InitIndexFreeSpaceMap(index); + /* no locking is needed */ initGISTstate(&buildstate.giststate, index); -- cgit v1.2.3