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cb3d2df90e
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
63 lines
1.9 KiB
PL/PgSQL
63 lines
1.9 KiB
PL/PgSQL
-- predictability
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SET synchronous_commit = on;
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DROP TABLE IF EXISTS replication_example;
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SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
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CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
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INSERT INTO replication_example(somedata) VALUES (1);
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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BEGIN;
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INSERT INTO replication_example(somedata) VALUES (2);
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ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
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INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
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COMMIT;
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BEGIN;
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INSERT INTO replication_example(somedata) VALUES (3);
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ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
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INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
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COMMIT;
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VACUUM FULL pg_am;
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VACUUM FULL pg_amop;
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VACUUM FULL pg_proc;
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VACUUM FULL pg_opclass;
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VACUUM FULL pg_type;
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VACUUM FULL pg_index;
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VACUUM FULL pg_database;
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-- repeated rewrites that fail
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BEGIN;
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CLUSTER pg_class USING pg_class_oid_index;
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CLUSTER pg_class USING pg_class_oid_index;
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ROLLBACK;
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-- repeated rewrites that succeed
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BEGIN;
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CLUSTER pg_class USING pg_class_oid_index;
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CLUSTER pg_class USING pg_class_oid_index;
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CLUSTER pg_class USING pg_class_oid_index;
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COMMIT;
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-- repeated rewrites in different transactions
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VACUUM FULL pg_class;
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VACUUM FULL pg_class;
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INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
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BEGIN;
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INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
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ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
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INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
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COMMIT;
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-- make old files go away
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CHECKPOINT;
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SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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SELECT pg_drop_replication_slot('regression_slot');
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DROP TABLE IF EXISTS replication_example;
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