mirror of
https://github.com/postgres/postgres.git
synced 2026-06-04 14:55:34 -04:00
Amit Kapila
6f918159a9
In commit b0eaa4c51b, we left out a test that used a vacuum to remove dead
rows as the behavior of test was not predictable. This test has been
rewritten to use fillfactor instead to control free space. Since we no
longer need to remove dead rows as part of the test, put the fsm regression
test in a parallel group.
Author: John Naylor
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/CAA4eK1L=qWp_bJ5aTc9+fy4Ewx2LPaLWY-RbR4a60g_rupCKnQ@mail.gmail.com
67 lines
2.2 KiB
SQL
67 lines
2.2 KiB
SQL
--
|
|
-- Free Space Map test
|
|
--
|
|
SELECT current_setting('block_size')::integer AS blocksize,
|
|
current_setting('block_size')::integer / 8 AS strsize
|
|
\gset
|
|
|
|
CREATE TABLE fsm_check_size (num int, str text);
|
|
|
|
-- Fill 3 blocks with one record each
|
|
ALTER TABLE fsm_check_size SET (fillfactor=15);
|
|
INSERT INTO fsm_check_size SELECT i, rpad('', :strsize, 'a')
|
|
FROM generate_series(1,3) i;
|
|
|
|
-- There should be no FSM
|
|
VACUUM fsm_check_size;
|
|
SELECT pg_relation_size('fsm_check_size', 'main') / :blocksize AS heap_nblocks,
|
|
pg_relation_size('fsm_check_size', 'fsm') / :blocksize AS fsm_nblocks;
|
|
|
|
-- The following operations are for testing the functionality of the local
|
|
-- in-memory map. In particular, we want to be able to insert into some
|
|
-- other block than the one at the end of the heap, without using a FSM.
|
|
|
|
-- Fill most of the last block
|
|
ALTER TABLE fsm_check_size SET (fillfactor=100);
|
|
INSERT INTO fsm_check_size SELECT i, rpad('', :strsize, 'a')
|
|
FROM generate_series(101,105) i;
|
|
|
|
-- Make sure records can go into any block but the last one
|
|
ALTER TABLE fsm_check_size SET (fillfactor=30);
|
|
|
|
-- Insert large record and make sure it does not cause the relation to extend
|
|
INSERT INTO fsm_check_size VALUES (111, rpad('', :strsize, 'a'));
|
|
|
|
VACUUM fsm_check_size;
|
|
SELECT pg_relation_size('fsm_check_size', 'main') / :blocksize AS heap_nblocks,
|
|
pg_relation_size('fsm_check_size', 'fsm') / :blocksize AS fsm_nblocks;
|
|
|
|
-- Extend table with enough blocks to exceed the FSM threshold
|
|
DO $$
|
|
DECLARE curtid tid;
|
|
num int;
|
|
BEGIN
|
|
num = 11;
|
|
LOOP
|
|
INSERT INTO fsm_check_size VALUES (num, 'b') RETURNING ctid INTO curtid;
|
|
EXIT WHEN curtid >= tid '(4, 0)';
|
|
num = num + 1;
|
|
END LOOP;
|
|
END;
|
|
$$;
|
|
|
|
VACUUM fsm_check_size;
|
|
SELECT pg_relation_size('fsm_check_size', 'fsm') / :blocksize AS fsm_nblocks;
|
|
|
|
-- Add long random string to extend TOAST table to 1 block
|
|
INSERT INTO fsm_check_size
|
|
VALUES(0, (SELECT string_agg(md5(chr(i)), '')
|
|
FROM generate_series(1, :blocksize / 100) i));
|
|
|
|
VACUUM fsm_check_size;
|
|
SELECT pg_relation_size(reltoastrelid, 'main') / :blocksize AS toast_nblocks,
|
|
pg_relation_size(reltoastrelid, 'fsm') / :blocksize AS toast_fsm_nblocks
|
|
FROM pg_class WHERE relname = 'fsm_check_size';
|
|
|
|
DROP TABLE fsm_check_size;
|