*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.80 2008/07/01 02:09:34 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.81 2008/07/17 21:02:31 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
int at_vacuum_cost_delay;
int at_vacuum_cost_limit;
bool at_wraparound;
+ char *at_relname;
+ char *at_nspname;
+ char *at_datname;
} autovac_table;
/*-------------
PgStat_StatTabEntry *tabentry, bool *dovacuum,
bool *doanalyze, bool *wraparound);
-static void autovacuum_do_vac_analyze(Oid relid, bool dovacuum,
- bool doanalyze, int freeze_min_age,
- bool for_wraparound,
+static void autovacuum_do_vac_analyze(autovac_table *tab,
BufferAccessStrategy bstrategy);
static HeapTuple get_pg_autovacuum_tuple_relid(Relation avRel, Oid relid);
static PgStat_StatTabEntry *get_pgstat_tabentry_relid(Oid relid, bool isshared,
PgStat_StatDBEntry *shared,
PgStat_StatDBEntry *dbentry);
-static void autovac_report_activity(VacuumStmt *vacstmt, Oid relid);
+static void autovac_report_activity(autovac_table *tab);
static void avl_sighup_handler(SIGNAL_ARGS);
static void avl_sigusr1_handler(SIGNAL_ARGS);
static void avl_sigterm_handler(SIGNAL_ARGS);
autovac_table *tab;
WorkerInfo worker;
bool skipit;
- char *datname,
- *nspname,
- *relname;
CHECK_FOR_INTERRUPTS();
/*
* Save the relation name for a possible error message, to avoid a
- * catalog lookup in case of an error. Note: they must live in a
- * long-lived memory context because we call vacuum and analyze in
- * different transactions.
+ * catalog lookup in case of an error. If any of these return NULL,
+ * then the relation has been dropped since last we checked; skip it.
+ * Note: they must live in a long-lived memory context because we call
+ * vacuum and analyze in different transactions.
*/
- datname = get_database_name(MyDatabaseId);
- nspname = get_namespace_name(get_rel_namespace(tab->at_relid));
- relname = get_rel_name(tab->at_relid);
+
+ tab->at_relname = get_rel_name(tab->at_relid);
+ tab->at_nspname = get_namespace_name(get_rel_namespace(tab->at_relid));
+ tab->at_datname = get_database_name(MyDatabaseId);
+ if (!tab->at_relname || !tab->at_nspname || !tab->at_datname)
+ goto deleted;
/*
* We will abort vacuuming the current table if something errors out,
{
/* have at it */
MemoryContextSwitchTo(TopTransactionContext);
- autovacuum_do_vac_analyze(tab->at_relid,
- tab->at_dovacuum,
- tab->at_doanalyze,
- tab->at_freeze_min_age,
- tab->at_wraparound,
- bstrategy);
+ autovacuum_do_vac_analyze(tab, bstrategy);
/*
* Clear a possible query-cancel signal, to avoid a late reaction
HOLD_INTERRUPTS();
if (tab->at_dovacuum)
errcontext("automatic vacuum of table \"%s.%s.%s\"",
- datname, nspname, relname);
+ tab->at_datname, tab->at_nspname, tab->at_relname);
else
errcontext("automatic analyze of table \"%s.%s.%s\"",
- datname, nspname, relname);
+ tab->at_datname, tab->at_nspname, tab->at_relname);
EmitErrorReport();
/* this resets the PGPROC flags too */
/* the PGPROC flags are reset at the next end of transaction */
/* be tidy */
+deleted:
+ if (tab->at_datname != NULL)
+ pfree(tab->at_datname);
+ if (tab->at_nspname != NULL)
+ pfree(tab->at_nspname);
+ if (tab->at_relname != NULL)
+ pfree(tab->at_relname);
pfree(tab);
- pfree(datname);
- pfree(nspname);
- pfree(relname);
/* remove my info from shared memory */
LWLockAcquire(AutovacuumLock, LW_EXCLUSIVE);
* Recheck whether a plain table still needs vacuum or analyze; be it because
* it does directly, or because its TOAST table does. Return value is a valid
* autovac_table pointer if it does, NULL otherwise.
+ *
+ * Note that the returned autovac_table does not have the name fields set.
*/
static autovac_table *
table_recheck_autovac(Oid relid)
tab->at_vacuum_cost_limit = vac_cost_limit;
tab->at_vacuum_cost_delay = vac_cost_delay;
tab->at_wraparound = wraparound || toast_wraparound;
+ tab->at_relname = NULL;
+ tab->at_nspname = NULL;
+ tab->at_datname = NULL;
}
heap_close(avRel, AccessShareLock);
* Vacuum and/or analyze the specified table
*/
static void
-autovacuum_do_vac_analyze(Oid relid, bool dovacuum, bool doanalyze,
- int freeze_min_age, bool for_wraparound,
+autovacuum_do_vac_analyze(autovac_table *tab,
BufferAccessStrategy bstrategy)
{
VacuumStmt vacstmt;
MemSet(&vacstmt, 0, sizeof(vacstmt));
vacstmt.type = T_VacuumStmt;
- vacstmt.vacuum = dovacuum;
+ vacstmt.vacuum = tab->at_dovacuum;
vacstmt.full = false;
- vacstmt.analyze = doanalyze;
- vacstmt.freeze_min_age = freeze_min_age;
+ vacstmt.analyze = tab->at_doanalyze;
+ vacstmt.freeze_min_age = tab->at_freeze_min_age;
vacstmt.verbose = false;
vacstmt.relation = NULL; /* not used since we pass a relid */
vacstmt.va_cols = NIL;
/* Let pgstat know what we're doing */
- autovac_report_activity(&vacstmt, relid);
+ autovac_report_activity(tab);
- vacuum(&vacstmt, relid, bstrategy, for_wraparound, true);
+ vacuum(&vacstmt, tab->at_relid, bstrategy, tab->at_wraparound, true);
}
/*
* bother to report "<IDLE>" or some such.
*/
static void
-autovac_report_activity(VacuumStmt *vacstmt, Oid relid)
+autovac_report_activity(autovac_table *tab)
{
- char *relname = get_rel_name(relid);
- char *nspname = get_namespace_name(get_rel_namespace(relid));
-
#define MAX_AUTOVAC_ACTIV_LEN (NAMEDATALEN * 2 + 32)
- char activity[MAX_AUTOVAC_ACTIV_LEN];
+ char activity[MAX_AUTOVAC_ACTIV_LEN];
+ int len;
/* Report the command and possible options */
- if (vacstmt->vacuum)
+ if (tab->at_dovacuum)
snprintf(activity, MAX_AUTOVAC_ACTIV_LEN,
"autovacuum: VACUUM%s",
- vacstmt->analyze ? " ANALYZE" : "");
+ tab->at_doanalyze ? " ANALYZE" : "");
else
snprintf(activity, MAX_AUTOVAC_ACTIV_LEN,
"autovacuum: ANALYZE");
/*
* Report the qualified name of the relation.
- *
- * Paranoia is appropriate here in case relation was recently dropped ---
- * the lsyscache routines we just invoked will return NULL rather than
- * failing.
*/
- if (relname && nspname)
- {
- int len = strlen(activity);
+ len = strlen(activity);
- snprintf(activity + len, MAX_AUTOVAC_ACTIV_LEN - len,
- " %s.%s", nspname, relname);
- }
+ snprintf(activity + len, MAX_AUTOVAC_ACTIV_LEN - len,
+ " %s.%s", tab->at_nspname, tab->at_relname);
/* Set statement_timestamp() to current time for pg_stat_activity */
SetCurrentStatementStartTimestamp();
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