73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
--
|
|
-- VACUUM
|
|
--
|
|
CREATE TABLE vactst (i INT);
|
|
INSERT INTO vactst VALUES (1);
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst VALUES (0);
|
|
SELECT count(*) FROM vactst;
|
|
count
|
|
-------
|
|
2049
|
|
(1 row)
|
|
|
|
DELETE FROM vactst WHERE i != 0;
|
|
SELECT * FROM vactst;
|
|
i
|
|
---
|
|
0
|
|
(1 row)
|
|
|
|
VACUUM FULL vactst;
|
|
UPDATE vactst SET i = i + 1;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst SELECT * FROM vactst;
|
|
INSERT INTO vactst VALUES (0);
|
|
SELECT count(*) FROM vactst;
|
|
count
|
|
-------
|
|
2049
|
|
(1 row)
|
|
|
|
DELETE FROM vactst WHERE i != 0;
|
|
VACUUM (FULL) vactst;
|
|
DELETE FROM vactst;
|
|
SELECT * FROM vactst;
|
|
i
|
|
---
|
|
(0 rows)
|
|
|
|
VACUUM (FULL, FREEZE) vactst;
|
|
VACUUM (ANALYZE, FULL) vactst;
|
|
CREATE TABLE vaccluster (i INT PRIMARY KEY);
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "vaccluster_pkey" for table "vaccluster"
|
|
ALTER TABLE vaccluster CLUSTER ON vaccluster_pkey;
|
|
INSERT INTO vaccluster SELECT * FROM vactst;
|
|
CLUSTER vaccluster;
|
|
VACUUM FULL pg_am;
|
|
VACUUM FULL pg_class;
|
|
VACUUM FULL pg_database;
|
|
VACUUM FULL vaccluster;
|
|
VACUUM FULL vactst;
|
|
DROP TABLE vaccluster;
|
|
DROP TABLE vactst;
|