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Autovacuum loose end mop-up. Provide autovacuum-specific vacuum cost
delay and limit, both as global GUCs and as table-specific entries in pg_autovacuum. stats_reset_on_server_start is now OFF by default, but a reset is forced if we did WAL replay. XID-wrap vacuums do not ANALYZE, but do FREEZE if it's a template database. Alvaro Herrera
This commit is contained in:
Tom Lane
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.156 2005/08/08 03:12:14 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.157 2005/08/11 21:11:46 tgl Exp $
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*
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*
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*-------------------------------------------------------------------------
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@ -20,8 +20,10 @@
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#include <math.h>
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#include <unistd.h>
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#include "access/genam.h"
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#include "access/heapam.h"
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#include "catalog/catalog.h"
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#include "catalog/indexing.h"
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#include "catalog/namespace.h"
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#include "catalog/pg_authid.h"
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#include "catalog/pg_database.h"
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@ -79,7 +81,7 @@ FindMyDatabase(const char *name, Oid *db_id, Oid *db_tablespace)
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char *filename;
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FILE *db_file;
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char thisname[NAMEDATALEN];
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TransactionId frozenxid;
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TransactionId dummyxid;
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filename = database_getflatfilename();
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db_file = AllocateFile(filename, "r");
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@ -89,7 +91,8 @@ FindMyDatabase(const char *name, Oid *db_id, Oid *db_tablespace)
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errmsg("could not open file \"%s\": %m", filename)));
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while (read_pg_database_line(db_file, thisname, db_id,
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db_tablespace, &frozenxid))
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db_tablespace, &dummyxid,
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&dummyxid))
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{
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if (strcmp(thisname, name) == 0)
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{
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@ -131,7 +134,7 @@ static void
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ReverifyMyDatabase(const char *name)
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{
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Relation pgdbrel;
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HeapScanDesc pgdbscan;
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SysScanDesc pgdbscan;
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ScanKeyData key;
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HeapTuple tup;
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Form_pg_database dbform;
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@ -147,9 +150,10 @@ ReverifyMyDatabase(const char *name)
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BTEqualStrategyNumber, F_NAMEEQ,
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NameGetDatum(name));
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pgdbscan = heap_beginscan(pgdbrel, SnapshotNow, 1, &key);
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pgdbscan = systable_beginscan(pgdbrel, DatabaseNameIndexId, true,
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SnapshotNow, 1, &key);
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tup = heap_getnext(pgdbscan, ForwardScanDirection);
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tup = systable_getnext(pgdbscan);
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if (!HeapTupleIsValid(tup) ||
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HeapTupleGetOid(tup) != MyDatabaseId)
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{
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@ -238,7 +242,7 @@ ReverifyMyDatabase(const char *name)
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}
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}
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heap_endscan(pgdbscan);
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systable_endscan(pgdbscan);
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heap_close(pgdbrel, RowShareLock);
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}
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@ -428,6 +432,18 @@ InitPostgres(const char *dbname, const char *username)
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/* Initialize portal manager */
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EnablePortalManager();
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/*
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* Set up process-exit callback to do pre-shutdown cleanup. This
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* has to be after we've initialized all the low-level modules
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* like the buffer manager, because during shutdown this has to
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* run before the low-level modules start to close down. On the
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* other hand, we want it in place before we begin our first
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* transaction --- if we fail during the initialization transaction,
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* as is entirely possible, we need the AbortTransaction call to
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* clean up.
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*/
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on_shmem_exit(ShutdownPostgres, 0);
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/* start a new transaction here before access to db */
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if (!bootstrap)
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StartTransactionCommand();
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@ -465,7 +481,8 @@ InitPostgres(const char *dbname, const char *username)
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/*
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* Unless we are bootstrapping, double-check that InitMyDatabaseInfo()
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* got a correct result. We can't do this until all the
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* database-access infrastructure is up.
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* database-access infrastructure is up. (Also, it wants to know if
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* the user is a superuser, so the above stuff has to happen first.)
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*/
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if (!bootstrap)
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ReverifyMyDatabase(dbname);
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@ -509,24 +526,10 @@ InitPostgres(const char *dbname, const char *username)
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/* initialize client encoding */
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InitializeClientEncoding();
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/*
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* Initialize statistics collection for this backend. We do this
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* here because the shutdown hook it sets up needs to be invoked
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* at the corresponding phase of backend shutdown: after
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* ShutdownPostgres and before we drop access to shared memory.
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*/
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/* initialize statistics collection for this backend */
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if (IsUnderPostmaster)
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pgstat_bestart();
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/*
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* Set up process-exit callback to do pre-shutdown cleanup. This
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* should be last because we want shmem_exit to call this routine
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* before the exit callbacks that are registered by buffer manager,
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* lock manager, etc. We need to run this code before we close down
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* database access!
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*/
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on_shmem_exit(ShutdownPostgres, 0);
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/* close the transaction we started above */
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if (!bootstrap)
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CommitTransactionCommand();
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@ -538,9 +541,7 @@ InitPostgres(const char *dbname, const char *username)
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/*
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* Backend-shutdown callback. Do cleanup that we want to be sure happens
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* before all the supporting modules begin to nail their doors shut via
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* their own callbacks. Note that because this has to be registered very
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* late in startup, it will not get called if we suffer a failure *during*
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* startup.
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* their own callbacks.
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*
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* User-level cleanup, such as temp-relation removal and UNLISTEN, happens
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* via separate callbacks that execute before this one. We don't combine the
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