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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
drop table if exists test.marker;
create table test.marker(a int);
update performance_schema.setup_consumers set enabled='NO';
update performance_schema.setup_instruments set enabled='NO';
update performance_schema.setup_instruments set enabled='YES'
where name like "wait/io/table/%";
truncate table performance_schema.events_waits_history_long;
flush status;
flush tables;
drop table if exists test.no_index_tab;
drop table if exists test.no_index_tab_1;
drop table if exists test.no_index_tab_2;
update performance_schema.setup_consumers set enabled='YES';
insert into marker set a = 1;
create table test.no_index_tab_1
( a varchar(255) not null, b int not null) engine = MyISAM;
insert into marker set a = 1;
create table test.no_index_tab_2 like test.no_index_tab_1;
insert into marker set a = 1;
create table test.no_index_tab
( a varchar(255) not null, b int not null) engine = merge
union = (test.no_index_tab_1,test.no_index_tab_2) insert_method = first;
insert into marker set a = 1;
show create table test.no_index_tab_1;
Table Create Table
no_index_tab_1 CREATE TABLE `no_index_tab_1` (
`a` varchar(255) NOT NULL,
`b` int(11) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
insert into marker set a = 1;
show create table test.no_index_tab_2;
Table Create Table
no_index_tab_2 CREATE TABLE `no_index_tab_2` (
`a` varchar(255) NOT NULL,
`b` int(11) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
insert into marker set a = 1;
show create table test.no_index_tab;
Table Create Table
no_index_tab CREATE TABLE `no_index_tab` (
`a` varchar(255) NOT NULL,
`b` int(11) NOT NULL
) ENGINE=MRG_MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci INSERT_METHOD=FIRST UNION=(`no_index_tab_1`,`no_index_tab_2`)
insert into marker set a = 1;
insert into test.no_index_tab set a = 'foo', b = 1;
insert into marker set a = 1;
insert into test.no_index_tab set a = 'foo', b = 2;
insert into marker set a = 1;
insert into test.no_index_tab set a = 'foo', b = 3;
insert into marker set a = 1;
select * from test.no_index_tab;
a b
foo 1
foo 2
foo 3
insert into marker set a = 1;
update test.no_index_tab set a = 'bar';
insert into marker set a = 1;
select * from test.no_index_tab limit 2;
a b
bar 1
bar 2
insert into marker set a = 1;
delete from test.no_index_tab where b = 3;
insert into marker set a = 1;
select * from test.no_index_tab;
a b
bar 1
bar 2
insert into marker set a = 1;
optimize table test.no_index_tab;
Table Op Msg_type Msg_text
test.no_index_tab optimize note The storage engine for the table doesn't support optimize
insert into marker set a = 1;
select * from test.no_index_tab;
a b
bar 1
bar 2
insert into marker set a = 1;
truncate table test.no_index_tab;
insert into marker set a = 1;
drop table test.no_index_tab_1;
insert into marker set a = 1;
drop table test.no_index_tab_2;
insert into marker set a = 1;
drop table test.no_index_tab;
update performance_schema.setup_consumers set enabled='NO';
select event_name,
left(source, locate(":", source)) as short_source,
object_type, object_schema,
if (locate("#sql-", object_name), "#sql-XXXX", object_name)
as pretty_name,
operation, number_of_bytes
from performance_schema.events_waits_history_long
where event_name like 'wait/io/table/%'
and object_schema in ("test")
order by thread_id, event_id;
event_name short_source object_type object_schema pretty_name operation number_of_bytes
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 3
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test no_index_tab update 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test no_index_tab update 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test no_index_tab update 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 2
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test no_index_tab delete 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 2
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test no_index_tab fetch 2
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
wait/io/table/sql/handler TABLE test marker insert 1
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
truncate performance_schema.events_waits_history_long;
flush status;
update performance_schema.setup_consumers set enabled='NO';
truncate performance_schema.events_waits_history_long;
drop table test.marker;
flush status;
update performance_schema.setup_instruments set enabled='YES';
update performance_schema.setup_consumers set enabled='YES';
|
