mirror of https://github.com/postgres/postgres
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
1.2 KiB
33 lines
1.2 KiB
4 years ago
|
CREATE EXTENSION pg_freespacemap;
|
||
|
|
|
||
|
|
CREATE TABLE freespace_tab (c1 int) WITH (autovacuum_enabled = off);
|
||
|
|
CREATE INDEX freespace_brin ON freespace_tab USING brin (c1);
|
||
|
|
CREATE INDEX freespace_btree ON freespace_tab USING btree (c1);
|
||
|
|
CREATE INDEX freespace_hash ON freespace_tab USING hash (c1);
|
||
|
|
|
||
|
|
-- report all the sizes of the FSMs for all the relation blocks.
|
||
|
|
WITH rel AS (SELECT oid::regclass AS id FROM pg_class WHERE relname ~ 'freespace')
|
||
|
|
SELECT rel.id, fsm.blkno, (fsm.avail > 0) AS is_avail
|
||
|
|
FROM rel, LATERAL pg_freespace(rel.id) AS fsm
|
||
|
|
ORDER BY 1, 2;
|
||
|
|
|
||
|
|
INSERT INTO freespace_tab VALUES (1);
|
||
|
|
VACUUM freespace_tab;
|
||
|
|
WITH rel AS (SELECT oid::regclass AS id FROM pg_class WHERE relname ~ 'freespace')
|
||
|
|
SELECT rel.id, fsm.blkno, (fsm.avail > 0) AS is_avail
|
||
|
|
FROM rel, LATERAL pg_freespace(rel.id) AS fsm
|
||
|
|
ORDER BY 1, 2;
|
||
|
|
|
||
|
|
DELETE FROM freespace_tab;
|
||
|
|
VACUUM freespace_tab;
|
||
|
|
WITH rel AS (SELECT oid::regclass AS id FROM pg_class WHERE relname ~ 'freespace')
|
||
|
|
SELECT rel.id, fsm.blkno, (fsm.avail > 0) AS is_avail
|
||
|
|
FROM rel, LATERAL pg_freespace(rel.id) AS fsm
|
||
|
|
ORDER BY 1, 2;
|
||
|
|
|
||
|
|
-- failures with incorrect block number
|
||
|
|
SELECT * FROM pg_freespace('freespace_tab', -1);
|
||
|
|
SELECT * FROM pg_freespace('freespace_tab', 4294967295);
|
||
|
|
|
||
|
|
DROP TABLE freespace_tab;
|