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
|
update performance_schema.setup_instruments set enabled='NO';
update performance_schema.setup_instruments set enabled='YES'
where name like "wait/io/file/myisam/%";
update performance_schema.setup_consumers
set enabled='YES';
truncate table performance_schema.events_waits_history_long;
truncate table performance_schema.events_statements_summary_by_digest;
flush global status;
drop table if exists test.no_index_tab;
create table test.no_index_tab ( a varchar(255), b int ) engine=myisam;
insert into no_index_tab set a = 'foo', b = 1;
insert into no_index_tab set a = 'foo', b = 1;
insert into no_index_tab set a = 'foo', b = 1;
select event_name,
left(source, locate(":", source)) as short_source,
operation, number_of_bytes,
substring(object_name, locate("no_index_tab", object_name)) as short_name
from performance_schema.events_waits_history_long
where operation not like "tell"
and event_name like "wait/io/file/myisam/%"
having short_name <> ""
order by thread_id, event_id;
event_name short_source operation number_of_bytes short_name
wait/io/file/myisam/kfile create NULL no_index_tab.MYI
wait/io/file/myisam/dfile create NULL no_index_tab.MYD
wait/io/file/myisam/kfile write 176 no_index_tab.MYI
wait/io/file/myisam/kfile write 100 no_index_tab.MYI
wait/io/file/myisam/kfile write 7 no_index_tab.MYI
wait/io/file/myisam/kfile write 7 no_index_tab.MYI
wait/io/file/myisam/kfile write 7 no_index_tab.MYI
wait/io/file/myisam/kfile chsize 1024 no_index_tab.MYI
wait/io/file/myisam/dfile close NULL no_index_tab.MYD
wait/io/file/myisam/kfile close NULL no_index_tab.MYI
wait/io/file/myisam/kfile open NULL no_index_tab.MYI
wait/io/file/myisam/kfile read 24 no_index_tab.MYI
wait/io/file/myisam/kfile seek NULL no_index_tab.MYI
wait/io/file/myisam/kfile read 297 no_index_tab.MYI
wait/io/file/myisam/dfile open NULL no_index_tab.MYD
wait/io/file/myisam/kfile write 3 no_index_tab.MYI
wait/io/file/myisam/dfile write 20 no_index_tab.MYD
wait/io/file/myisam/kfile write 124 no_index_tab.MYI
wait/io/file/myisam/dfile write 20 no_index_tab.MYD
wait/io/file/myisam/kfile write 124 no_index_tab.MYI
wait/io/file/myisam/dfile write 20 no_index_tab.MYD
wait/io/file/myisam/kfile write 124 no_index_tab.MYI
show global status like 'performance_schema_%';
Variable_name Value
Performance_schema_accounts_lost 0
Performance_schema_cond_classes_lost 0
Performance_schema_cond_instances_lost 0
Performance_schema_digest_lost 0
Performance_schema_file_classes_lost 0
Performance_schema_file_handles_lost 0
Performance_schema_file_instances_lost 0
Performance_schema_hosts_lost 0
Performance_schema_index_stat_lost 0
Performance_schema_locker_lost 0
Performance_schema_memory_classes_lost 0
Performance_schema_metadata_lock_lost 0
Performance_schema_mutex_classes_lost 0
Performance_schema_mutex_instances_lost 0
Performance_schema_nested_statement_lost 0
Performance_schema_prepared_statements_lost 0
Performance_schema_program_lost 0
Performance_schema_rwlock_classes_lost 0
Performance_schema_rwlock_instances_lost 0
Performance_schema_session_connect_attrs_lost 0
Performance_schema_socket_classes_lost 0
Performance_schema_socket_instances_lost 0
Performance_schema_stage_classes_lost 0
Performance_schema_statement_classes_lost 0
Performance_schema_table_handles_lost 0
Performance_schema_table_instances_lost 0
Performance_schema_table_lock_stat_lost 0
Performance_schema_thread_classes_lost 0
Performance_schema_thread_instances_lost 0
Performance_schema_users_lost 0
update performance_schema.setup_instruments set enabled='YES';
drop table test.no_index_tab;
|
