mirror of
https://github.com/postgres/postgres.git
synced 2025-10-24 01:29:19 +03:00
d6fa44fce7
The regression tests for contrib/test_decoding regularly failed on postgres instances that were very slow. Either because the hardware itself was slow or because very expensive debugging options like CLOBBER_CACHE_ALWAYS were used. The reason they failed was just that some additional transactions were decoded. Analyze and vacuum, triggered by autovac. To fix just add a option to test_decoding to only display transactions in which a change was actually displayed. That's not pretty because it removes information from the tests; but better than constantly failing tests in very likely harmless ways. Backpatch to 9.4 where logical decoding was introduced. Discussion: 20140629142511.GA26930@awork2.anarazel.de
86 lines
3.8 KiB
Plaintext
86 lines
3.8 KiB
Plaintext
-- predictability
|
|
SET synchronous_commit = on;
|
|
DROP TABLE IF EXISTS replication_example;
|
|
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
|
|
INSERT INTO replication_example(somedata) VALUES (1);
|
|
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
|
|
data
|
|
----------------------------------------------------------------------------------------------------------
|
|
BEGIN
|
|
table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:null
|
|
COMMIT
|
|
(3 rows)
|
|
|
|
BEGIN;
|
|
INSERT INTO replication_example(somedata) VALUES (2);
|
|
ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
|
|
INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
|
|
COMMIT;
|
|
BEGIN;
|
|
INSERT INTO replication_example(somedata) VALUES (3);
|
|
ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
|
|
INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
|
|
COMMIT;
|
|
VACUUM FULL pg_am;
|
|
VACUUM FULL pg_amop;
|
|
VACUUM FULL pg_proc;
|
|
VACUUM FULL pg_opclass;
|
|
VACUUM FULL pg_type;
|
|
VACUUM FULL pg_index;
|
|
VACUUM FULL pg_database;
|
|
-- repeated rewrites that fail
|
|
BEGIN;
|
|
CLUSTER pg_class USING pg_class_oid_index;
|
|
CLUSTER pg_class USING pg_class_oid_index;
|
|
ROLLBACK;
|
|
-- repeated rewrites that succeed
|
|
BEGIN;
|
|
CLUSTER pg_class USING pg_class_oid_index;
|
|
CLUSTER pg_class USING pg_class_oid_index;
|
|
CLUSTER pg_class USING pg_class_oid_index;
|
|
COMMIT;
|
|
-- repeated rewrites in different transactions
|
|
VACUUM FULL pg_class;
|
|
VACUUM FULL pg_class;
|
|
INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
|
|
BEGIN;
|
|
INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
|
|
ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
|
|
INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
|
|
COMMIT;
|
|
-- make old files go away
|
|
CHECKPOINT;
|
|
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
|
|
data
|
|
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|
BEGIN
|
|
table public.replication_example: INSERT: id[integer]:2 somedata[integer]:2 text[character varying]:null
|
|
table public.replication_example: INSERT: id[integer]:3 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:1
|
|
COMMIT
|
|
BEGIN
|
|
table public.replication_example: INSERT: id[integer]:4 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:null
|
|
table public.replication_example: INSERT: id[integer]:5 somedata[integer]:4 text[character varying]:null testcolumn1[integer]:2 testcolumn2[integer]:1
|
|
COMMIT
|
|
BEGIN
|
|
table public.replication_example: INSERT: id[integer]:6 somedata[integer]:5 text[character varying]:null testcolumn1[integer]:3 testcolumn2[integer]:null
|
|
COMMIT
|
|
BEGIN
|
|
table public.replication_example: INSERT: id[integer]:7 somedata[integer]:6 text[character varying]:null testcolumn1[integer]:4 testcolumn2[integer]:null
|
|
table public.replication_example: INSERT: id[integer]:8 somedata[integer]:7 text[character varying]:null testcolumn1[integer]:5 testcolumn2[integer]:null testcolumn3[integer]:1
|
|
COMMIT
|
|
(15 rows)
|
|
|
|
SELECT pg_drop_replication_slot('regression_slot');
|
|
pg_drop_replication_slot
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
DROP TABLE IF EXISTS replication_example;
|