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Add code to dump contents of free space map into $PGDATA/global/pg_fsm.cache

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at database shutdown, and then load it again at database startup.  This
preserves our hard-won knowledge of free space across restarts (given
an orderly shutdown, that is).
This commit is contained in:
Tom Lane
2003-03-06 00:04:27 +00:00
parent 21591967bc
commit 4b6c198a6a
4 changed files with 376 additions and 83 deletions
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12
src/backend/tcop/postgres.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.315 2003/02/10 04:44:46 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.316 2003/03/06 00:04:27 tgl Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@ -46,6 +46,7 @@
#include "parser/analyze.h"
#include "parser/parser.h"
#include "rewrite/rewriteHandler.h"
#include "storage/freespace.h"
#include "storage/ipc.h"
#include "storage/proc.h"
#include "tcop/fastpath.h"
@ -1740,6 +1741,13 @@ PostgresMain(int argc, char *argv[], const char *username)
*/
StartupXLOG();
on_shmem_exit(ShutdownXLOG, 0);
/*
* Read any existing FSM cache file, and register to write one out
* at exit.
*/
LoadFreeSpaceMap();
on_shmem_exit(DumpFreeSpaceMap, 0);
}
/*
@ -1781,7 +1789,7 @@ PostgresMain(int argc, char *argv[], const char *username)
if (!IsUnderPostmaster)
{
puts("\nPOSTGRES backend interactive interface ");
puts("$Revision: 1.315 $ $Date: 2003/02/10 04:44:46 $\n");
puts("$Revision: 1.316 $ $Date: 2003/03/06 00:04:27 $\n");
}
/*