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
|
# Activate master-slave replication
stop slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
reset master;
reset slave;
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
start slave;
# Make table t for test
DROP TABLE IF EXISTS t;
CREATE TABLE t(id INT);
# Start slave replication
START SLAVE;
INSERT INTO t VALUES (1);
# Read information about master binlog
# Sync(1) slave thread
# Read and change log_slow_slave_statements to ON on slave
show variables like 'log_slow_slave_statements';
Variable_name Value
log_slow_slave_statements OFF
set global log_slow_slave_statements=ON;
show variables like 'log_slow_slave_statements';
Variable_name Value
log_slow_slave_statements ON
INSERT INTO t VALUES (2);
# Read information about master binlog
# Sync slave(2) thread
# Restart slave
STOP SLAVE;
START SLAVE;
INSERT INTO t VALUES (3);
# Read information about master binlog
# Sync(3) slave thread
# Read and change log_slow_slave_statements to OFF on slave
show variables like 'log_slow_slave_statements';
Variable_name Value
log_slow_slave_statements ON
set global log_slow_slave_statements=OFF;
show variables like 'log_slow_slave_statements';
Variable_name Value
log_slow_slave_statements OFF
INSERT INTO t VALUES (4);
# Read information about master binlog
# Sync slave(4) thread
# Restart slave
STOP SLAVE;
START SLAVE;
INSERT INTO t VALUES (5);
# Read information about master binlog
# Sync slave(5) thread
# Read and change log_slow_slave_statements to ON on slave
show variables like 'log_slow_slave_statements';
Variable_name Value
log_slow_slave_statements OFF
set global log_slow_slave_statements=ON;
show variables like 'log_slow_slave_statements';
Variable_name Value
log_slow_slave_statements ON
INSERT INTO t VALUES (6);
# Read information about master binlog
# Sync slave(6) thread
# Restart slave
STOP SLAVE;
START SLAVE;
INSERT INTO t VALUES (7);
# Read information about master binlog
# Sync slave(7) thread
FLUSH LOGS;
# Analyse master slow_query_log
1
1
1
1
1
1
1
FLUSH LOGS;
# Analyse slave slow_query_log
0
0
1
0
0
0
1
set global log_slow_slave_statements=OFF;
DROP TABLE t;
# Read information about master binlog
# Sync slave(8) thread
|
