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Integrate autovacuum functionality into the backend. There's still a

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few loose ends to be dealt with, but it seems to work.  Alvaro Herrera,
based on the contrib code by Matthew O'Connor.
This commit is contained in:
Tom Lane
2005-07-14 05:13:45 +00:00
parent f2bf2d2dc5
commit 29094193f5
25 changed files with 1678 additions and 90 deletions
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37
src/backend/commands/vacuum.c
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@@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.310 2005/06/14 22:15:32 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.311 2005/07/14 05:13:39 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -166,7 +166,8 @@ static TransactionId FreezeLimit;
/* non-export function prototypes */
static List *get_rel_oids(const RangeVar *vacrel, const char *stmttype);
static List *get_rel_oids(List *relids, const RangeVar *vacrel,
const char *stmttype);
static void vac_update_dbstats(Oid dbid,
TransactionId vacuumXID,
TransactionId frozenXID);
@@ -221,9 +222,18 @@ static bool enough_space(VacPage vacpage, Size len);
/*
* Primary entry point for VACUUM and ANALYZE commands.
*
* relids is normally NIL; if it is not, then it provides the list of
* relation OIDs to be processed, and vacstmt->relation is ignored.
* (The non-NIL case is currently only used by autovacuum.)
*
* It is the caller's responsibility that both vacstmt and relids
* (if given) be allocated in a memory context that won't disappear
* at transaction commit. In fact this context must be QueryContext
* to avoid complaints from PreventTransactionChain.
*/
void
vacuum(VacuumStmt *vacstmt)
vacuum(VacuumStmt *vacstmt, List *relids)
{
const char *stmttype = vacstmt->vacuum ? "VACUUM" : "ANALYZE";
TransactionId initialOldestXmin = InvalidTransactionId;
@@ -302,11 +312,14 @@ vacuum(VacuumStmt *vacstmt)
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
/* Assume we are processing everything unless one table is mentioned */
all_rels = (vacstmt->relation == NULL);
/* Remember whether we are processing everything in the DB */
all_rels = (relids == NIL && vacstmt->relation == NULL);
/* Build list of relations to process (note this lives in vac_context) */
relations = get_rel_oids(vacstmt->relation, stmttype);
/*
* Build list of relations to process, unless caller gave us one.
* (If we build one, we put it in vac_context for safekeeping.)
*/
relations = get_rel_oids(relids, vacstmt->relation, stmttype);
if (vacstmt->vacuum && all_rels)
{
@@ -512,11 +525,15 @@ vacuum(VacuumStmt *vacstmt)
* per-relation transactions.
*/
static List *
get_rel_oids(const RangeVar *vacrel, const char *stmttype)
get_rel_oids(List *relids, const RangeVar *vacrel, const char *stmttype)
{
List *oid_list = NIL;
MemoryContext oldcontext;
/* List supplied by VACUUM's caller? */
if (relids)
return relids;
if (vacrel)
{
/* Process a specific relation */
@@ -1146,6 +1163,10 @@ full_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
/* update statistics in pg_class */
vac_update_relstats(RelationGetRelid(onerel), vacrelstats->rel_pages,
vacrelstats->rel_tuples, vacrelstats->hasindex);
/* report results to the stats collector, too */
pgstat_report_vacuum(RelationGetRelid(onerel), vacstmt->analyze,
vacrelstats->rel_tuples);
}