1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
#
# MW-336 Slave threads may leak if variable wsrep_slave_threads is set repeatedly
#
--source include/galera_cluster.inc
--source include/have_innodb.inc
--source include/force_restart.inc
--connection node_1
CREATE TABLE t1 (f1 INTEGER) Engine=InnoDB;
SET GLOBAL wsrep_slave_threads = 10;
# ensure that the threads have actually started running
--echo # Set slave threads to 10 step 1
--let $wait_condition = SELECT VARIABLE_VALUE = 10 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 10 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_10 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
SET GLOBAL wsrep_slave_threads = 1;
--connection node_2
INSERT INTO t1 VALUES (1);
--connection node_1
--echo # Wait until one of the appliers has exited
--let $wait_condition = SELECT VARIABLE_VALUE = 9 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 9 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_9 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
SET GLOBAL wsrep_slave_threads = 10;
# Note that above insert could be handled by one of the slave threads
--echo # Set slave threads to 10 step 2
--let $wait_condition = SELECT VARIABLE_VALUE = 10 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 10 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_10 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
SET GLOBAL wsrep_slave_threads = 20;
--echo # Set slave threads to 20
--let $wait_condition = SELECT VARIABLE_VALUE = 20 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 20 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_20 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
SET GLOBAL wsrep_slave_threads = 1;
--connection node_2
INSERT INTO t1 VALUES (1);
INSERT INTO t1 VALUES (2);
INSERT INTO t1 VALUES (3);
INSERT INTO t1 VALUES (4);
INSERT INTO t1 VALUES (5);
INSERT INTO t1 VALUES (6);
INSERT INTO t1 VALUES (7);
INSERT INTO t1 VALUES (8);
INSERT INTO t1 VALUES (9);
INSERT INTO t1 VALUES (10);
INSERT INTO t1 VALUES (11);
INSERT INTO t1 VALUES (12);
INSERT INTO t1 VALUES (13);
INSERT INTO t1 VALUES (14);
INSERT INTO t1 VALUES (16);
INSERT INTO t1 VALUES (17);
INSERT INTO t1 VALUES (18);
INSERT INTO t1 VALUES (19);
INSERT INTO t1 VALUES (20);
--connection node_1
--echo # Wait until 19 of the appliers has exited
--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 1 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
SELECT COUNT(*) FROM t1;
SET GLOBAL wsrep_slave_threads = 10;
--echo # Set slave threads to 10 step 3
--let $wait_condition = SELECT VARIABLE_VALUE = 10 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 10 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_10 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--connection node_1
SET GLOBAL wsrep_slave_threads = 1;
--connection node_2
INSERT INTO t1 VALUES (21);
INSERT INTO t1 VALUES (22);
INSERT INTO t1 VALUES (23);
INSERT INTO t1 VALUES (24);
INSERT INTO t1 VALUES (25);
INSERT INTO t1 VALUES (26);
INSERT INTO t1 VALUES (27);
INSERT INTO t1 VALUES (28);
INSERT INTO t1 VALUES (29);
INSERT INTO t1 VALUES (30);
--connection node_1
--echo # Wait until slave threads back to 1
--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
--let $wait_condition_on_error_output = SELECT COUNT(*), 1 as EXPECTED_VALUE FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system user' AND STATE = 'wsrep applier idle'; show processlist
--source include/wait_condition_with_debug.inc
SELECT VARIABLE_VALUE AS EXPECT_1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_applier_thread_count';
SELECT COUNT(*) FROM t1;
DROP TABLE t1;
|
