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
|
flush global status;
SET @saved_thread_cache_size = @@global.thread_cache_size;
set global thread_cache_size = 0;
show global variables like "thread_cache_size";
Variable_name Value
thread_cache_size 0
connect con1, localhost, root, , ;
connect con2, localhost, root, , ;
connection default;
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
disconnect con2;
connection default;
connect con3, localhost, root, , ;
disconnect con3;
disconnect con1;
connection default;
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
set global thread_cache_size = 100;
show global variables like "thread_cache_size";
Variable_name Value
thread_cache_size 100
connect con1, localhost, root, , ;
connect con2, localhost, root, , ;
connection default;
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
disconnect con2;
connection default;
connect con3, localhost, root, , ;
disconnect con3;
disconnect con1;
connection default;
select @id_increment;
@id_increment
1
select @thread_id_increment;
@thread_id_increment
1
set global thread_cache_size = @saved_thread_cache_size;
show global status like "performance_schema_thread%";
Variable_name Value
Performance_schema_thread_classes_lost 0
Performance_schema_thread_instances_lost 0
|
