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When specified, this option allows VACUUM to skip the work on a relation if there is a conflicting lock on it when trying to open it at the beginning of its processing. Similarly to autovacuum, this comes with a couple of limitations while the relation is processed which can cause the process to still block: - when opening the relation indexes. - when acquiring row samples for table inheritance trees, partition trees or certain types of foreign tables, and that a lock is taken on some leaves of such trees. Author: Nathan Bossart Reviewed-by: Michael Paquier, Andres Freund, Masahiko Sawada Discussion: https://postgr.es/m/9EF7EBE4-720D-4CF1-9D0E-4403D7E92990@amazon.com Discussion: https://postgr.es/m/20171201160907.27110.74730@wrigleys.postgresql.org
185 lines
5.6 KiB
SQL
185 lines
5.6 KiB
SQL
--
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-- VACUUM
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--
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CREATE TABLE vactst (i INT);
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INSERT INTO vactst VALUES (1);
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst VALUES (0);
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SELECT count(*) FROM vactst;
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DELETE FROM vactst WHERE i != 0;
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SELECT * FROM vactst;
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VACUUM FULL vactst;
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UPDATE vactst SET i = i + 1;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst SELECT * FROM vactst;
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INSERT INTO vactst VALUES (0);
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SELECT count(*) FROM vactst;
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DELETE FROM vactst WHERE i != 0;
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VACUUM (FULL) vactst;
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DELETE FROM vactst;
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SELECT * FROM vactst;
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VACUUM (FULL, FREEZE) vactst;
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VACUUM (ANALYZE, FULL) vactst;
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CREATE TABLE vaccluster (i INT PRIMARY KEY);
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ALTER TABLE vaccluster CLUSTER ON vaccluster_pkey;
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CLUSTER vaccluster;
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CREATE FUNCTION do_analyze() RETURNS VOID VOLATILE LANGUAGE SQL
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AS 'ANALYZE pg_am';
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CREATE FUNCTION wrap_do_analyze(c INT) RETURNS INT IMMUTABLE LANGUAGE SQL
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AS 'SELECT $1 FROM do_analyze()';
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CREATE INDEX ON vaccluster(wrap_do_analyze(i));
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INSERT INTO vaccluster VALUES (1), (2);
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ANALYZE vaccluster;
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VACUUM FULL pg_am;
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VACUUM FULL pg_class;
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VACUUM FULL pg_database;
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VACUUM FULL vaccluster;
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VACUUM FULL vactst;
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VACUUM (DISABLE_PAGE_SKIPPING) vaccluster;
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-- partitioned table
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CREATE TABLE vacparted (a int, b char) PARTITION BY LIST (a);
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CREATE TABLE vacparted1 PARTITION OF vacparted FOR VALUES IN (1);
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INSERT INTO vacparted VALUES (1, 'a');
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UPDATE vacparted SET b = 'b';
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VACUUM (ANALYZE) vacparted;
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VACUUM (FULL) vacparted;
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VACUUM (FREEZE) vacparted;
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-- check behavior with duplicate column mentions
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VACUUM ANALYZE vacparted(a,b,a);
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ANALYZE vacparted(a,b,b);
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-- multiple tables specified
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VACUUM vaccluster, vactst;
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VACUUM vacparted, does_not_exist;
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VACUUM (FREEZE) vacparted, vaccluster, vactst;
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VACUUM (FREEZE) does_not_exist, vaccluster;
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VACUUM ANALYZE vactst, vacparted (a);
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VACUUM ANALYZE vactst (does_not_exist), vacparted (b);
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VACUUM FULL vacparted, vactst;
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VACUUM FULL vactst, vacparted (a, b), vaccluster (i);
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ANALYZE vactst, vacparted;
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ANALYZE vacparted (b), vactst;
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ANALYZE vactst, does_not_exist, vacparted;
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ANALYZE vactst (i), vacparted (does_not_exist);
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-- parenthesized syntax for ANALYZE
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ANALYZE (VERBOSE) does_not_exist;
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ANALYZE (nonexistent-arg) does_not_exist;
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-- ensure argument order independence, and that SKIP_LOCKED on non-existing
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-- relation still errors out.
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ANALYZE (SKIP_LOCKED, VERBOSE) does_not_exist;
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ANALYZE (VERBOSE, SKIP_LOCKED) does_not_exist;
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-- SKIP_LOCKED option
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VACUUM (SKIP_LOCKED) vactst;
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VACUUM (SKIP_LOCKED, FULL) vactst;
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ANALYZE (SKIP_LOCKED) vactst;
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DROP TABLE vaccluster;
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DROP TABLE vactst;
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DROP TABLE vacparted;
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-- relation ownership, WARNING logs generated as all are skipped.
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CREATE TABLE vacowned (a int);
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CREATE TABLE vacowned_parted (a int) PARTITION BY LIST (a);
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CREATE TABLE vacowned_part1 PARTITION OF vacowned_parted FOR VALUES IN (1);
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CREATE TABLE vacowned_part2 PARTITION OF vacowned_parted FOR VALUES IN (2);
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CREATE ROLE regress_vacuum;
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SET ROLE regress_vacuum;
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-- Simple table
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VACUUM vacowned;
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ANALYZE vacowned;
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VACUUM (ANALYZE) vacowned;
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-- Catalog
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VACUUM pg_catalog.pg_class;
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ANALYZE pg_catalog.pg_class;
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VACUUM (ANALYZE) pg_catalog.pg_class;
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-- Shared catalog
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VACUUM pg_catalog.pg_authid;
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ANALYZE pg_catalog.pg_authid;
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VACUUM (ANALYZE) pg_catalog.pg_authid;
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-- Partitioned table and its partitions, nothing owned by other user.
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-- Relations are not listed in a single command to test ownership
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-- independently.
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VACUUM vacowned_parted;
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VACUUM vacowned_part1;
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VACUUM vacowned_part2;
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ANALYZE vacowned_parted;
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ANALYZE vacowned_part1;
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ANALYZE vacowned_part2;
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VACUUM (ANALYZE) vacowned_parted;
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VACUUM (ANALYZE) vacowned_part1;
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VACUUM (ANALYZE) vacowned_part2;
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RESET ROLE;
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-- Partitioned table and one partition owned by other user.
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ALTER TABLE vacowned_parted OWNER TO regress_vacuum;
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ALTER TABLE vacowned_part1 OWNER TO regress_vacuum;
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SET ROLE regress_vacuum;
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VACUUM vacowned_parted;
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VACUUM vacowned_part1;
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VACUUM vacowned_part2;
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ANALYZE vacowned_parted;
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ANALYZE vacowned_part1;
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ANALYZE vacowned_part2;
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VACUUM (ANALYZE) vacowned_parted;
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VACUUM (ANALYZE) vacowned_part1;
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VACUUM (ANALYZE) vacowned_part2;
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RESET ROLE;
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-- Only one partition owned by other user.
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ALTER TABLE vacowned_parted OWNER TO CURRENT_USER;
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SET ROLE regress_vacuum;
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VACUUM vacowned_parted;
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VACUUM vacowned_part1;
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VACUUM vacowned_part2;
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ANALYZE vacowned_parted;
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ANALYZE vacowned_part1;
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ANALYZE vacowned_part2;
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VACUUM (ANALYZE) vacowned_parted;
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VACUUM (ANALYZE) vacowned_part1;
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VACUUM (ANALYZE) vacowned_part2;
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RESET ROLE;
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-- Only partitioned table owned by other user.
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ALTER TABLE vacowned_parted OWNER TO regress_vacuum;
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ALTER TABLE vacowned_part1 OWNER TO CURRENT_USER;
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SET ROLE regress_vacuum;
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VACUUM vacowned_parted;
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VACUUM vacowned_part1;
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VACUUM vacowned_part2;
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ANALYZE vacowned_parted;
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ANALYZE vacowned_part1;
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ANALYZE vacowned_part2;
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VACUUM (ANALYZE) vacowned_parted;
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VACUUM (ANALYZE) vacowned_part1;
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VACUUM (ANALYZE) vacowned_part2;
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RESET ROLE;
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DROP TABLE vacowned;
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DROP TABLE vacowned_parted;
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DROP ROLE regress_vacuum;
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