150 lines
6.0 KiB
Plaintext
150 lines
6.0 KiB
Plaintext
-- predictability
|
|
SET synchronous_commit = on;
|
|
SELECT 'init' FROM
|
|
pg_create_logical_replication_slot('regression_slot_stats1', 'test_decoding') s1,
|
|
pg_create_logical_replication_slot('regression_slot_stats2', 'test_decoding') s2,
|
|
pg_create_logical_replication_slot('regression_slot_stats3', 'test_decoding') s3;
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
CREATE TABLE stats_test(data text);
|
|
-- non-spilled xact
|
|
SET logical_decoding_work_mem to '64MB';
|
|
INSERT INTO stats_test values(1);
|
|
SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot_stats1', NULL, NULL, 'skip-empty-xacts', '1');
|
|
count
|
|
-------
|
|
3
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot_stats2', NULL, NULL, 'skip-empty-xacts', '1');
|
|
count
|
|
-------
|
|
3
|
|
(1 row)
|
|
|
|
SELECT count(*) FROM pg_logical_slot_get_changes('regression_slot_stats3', NULL, NULL, 'skip-empty-xacts', '1');
|
|
count
|
|
-------
|
|
3
|
|
(1 row)
|
|
|
|
SELECT pg_stat_force_next_flush();
|
|
pg_stat_force_next_flush
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT slot_name, spill_txns = 0 AS spill_txns, spill_count = 0 AS spill_count, total_txns > 0 AS total_txns, total_bytes > 0 AS total_bytes FROM pg_stat_replication_slots ORDER BY slot_name;
|
|
slot_name | spill_txns | spill_count | total_txns | total_bytes
|
|
------------------------+------------+-------------+------------+-------------
|
|
regression_slot_stats1 | t | t | t | t
|
|
regression_slot_stats2 | t | t | t | t
|
|
regression_slot_stats3 | t | t | t | t
|
|
(3 rows)
|
|
|
|
RESET logical_decoding_work_mem;
|
|
-- reset stats for one slot, others should be unaffected
|
|
SELECT pg_stat_reset_replication_slot('regression_slot_stats1');
|
|
pg_stat_reset_replication_slot
|
|
--------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT slot_name, spill_txns = 0 AS spill_txns, spill_count = 0 AS spill_count, total_txns > 0 AS total_txns, total_bytes > 0 AS total_bytes FROM pg_stat_replication_slots ORDER BY slot_name;
|
|
slot_name | spill_txns | spill_count | total_txns | total_bytes
|
|
------------------------+------------+-------------+------------+-------------
|
|
regression_slot_stats1 | t | t | f | f
|
|
regression_slot_stats2 | t | t | t | t
|
|
regression_slot_stats3 | t | t | t | t
|
|
(3 rows)
|
|
|
|
-- reset stats for all slots
|
|
SELECT pg_stat_reset_replication_slot(NULL);
|
|
pg_stat_reset_replication_slot
|
|
--------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT slot_name, spill_txns = 0 AS spill_txns, spill_count = 0 AS spill_count, total_txns > 0 AS total_txns, total_bytes > 0 AS total_bytes FROM pg_stat_replication_slots ORDER BY slot_name;
|
|
slot_name | spill_txns | spill_count | total_txns | total_bytes
|
|
------------------------+------------+-------------+------------+-------------
|
|
regression_slot_stats1 | t | t | f | f
|
|
regression_slot_stats2 | t | t | f | f
|
|
regression_slot_stats3 | t | t | f | f
|
|
(3 rows)
|
|
|
|
-- verify accessing/resetting stats for non-existent slot does something reasonable
|
|
SELECT * FROM pg_stat_get_replication_slot('do-not-exist');
|
|
slot_name | spill_txns | spill_count | spill_bytes | stream_txns | stream_count | stream_bytes | total_txns | total_bytes | stats_reset
|
|
--------------+------------+-------------+-------------+-------------+--------------+--------------+------------+-------------+-------------
|
|
do-not-exist | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|
|
(1 row)
|
|
|
|
SELECT pg_stat_reset_replication_slot('do-not-exist');
|
|
ERROR: replication slot "do-not-exist" does not exist
|
|
SELECT * FROM pg_stat_get_replication_slot('do-not-exist');
|
|
slot_name | spill_txns | spill_count | spill_bytes | stream_txns | stream_count | stream_bytes | total_txns | total_bytes | stats_reset
|
|
--------------+------------+-------------+-------------+-------------+--------------+--------------+------------+-------------+-------------
|
|
do-not-exist | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|
|
(1 row)
|
|
|
|
-- spilling the xact
|
|
BEGIN;
|
|
INSERT INTO stats_test SELECT 'serialize-topbig--1:'||g.i FROM generate_series(1, 5000) g(i);
|
|
COMMIT;
|
|
SELECT count(*) FROM pg_logical_slot_peek_changes('regression_slot_stats1', NULL, NULL, 'skip-empty-xacts', '1');
|
|
count
|
|
-------
|
|
5002
|
|
(1 row)
|
|
|
|
-- Check stats. We can't test the exact stats count as that can vary if any
|
|
-- background transaction (say by autovacuum) happens in parallel to the main
|
|
-- transaction.
|
|
SELECT pg_stat_force_next_flush();
|
|
pg_stat_force_next_flush
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT slot_name, spill_txns > 0 AS spill_txns, spill_count > 0 AS spill_count FROM pg_stat_replication_slots;
|
|
slot_name | spill_txns | spill_count
|
|
------------------------+------------+-------------
|
|
regression_slot_stats1 | t | t
|
|
regression_slot_stats2 | f | f
|
|
regression_slot_stats3 | f | f
|
|
(3 rows)
|
|
|
|
-- Ensure stats can be repeatedly accessed using the same stats snapshot. See
|
|
-- https://postgr.es/m/20210317230447.c7uc4g3vbs4wi32i%40alap3.anarazel.de
|
|
BEGIN;
|
|
SELECT slot_name FROM pg_stat_replication_slots;
|
|
slot_name
|
|
------------------------
|
|
regression_slot_stats1
|
|
regression_slot_stats2
|
|
regression_slot_stats3
|
|
(3 rows)
|
|
|
|
SELECT slot_name FROM pg_stat_replication_slots;
|
|
slot_name
|
|
------------------------
|
|
regression_slot_stats1
|
|
regression_slot_stats2
|
|
regression_slot_stats3
|
|
(3 rows)
|
|
|
|
COMMIT;
|
|
DROP TABLE stats_test;
|
|
SELECT pg_drop_replication_slot('regression_slot_stats1'),
|
|
pg_drop_replication_slot('regression_slot_stats2'),
|
|
pg_drop_replication_slot('regression_slot_stats3');
|
|
pg_drop_replication_slot | pg_drop_replication_slot | pg_drop_replication_slot
|
|
--------------------------+--------------------------+--------------------------
|
|
| |
|
|
(1 row)
|
|
|