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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
select connection_id() into @conid;
select thread_id from performance_schema.threads
where PROCESSLIST_ID = @conid
into @tid;
select thread_os_id from performance_schema.threads
where PROCESSLIST_ID = @conid
into @osid;
explain select THREAD_ID, NAME from performance_schema.threads
where thread_id = 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL const PRIMARY PRIMARY 8 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select '1' AS `THREAD_ID`,'thread/sql/main' AS `NAME` from `performance_schema`.`threads` where true
explain select * from performance_schema.threads
where thread_id > 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PRIMARY NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`THREAD_ID` > 1)
explain select * from performance_schema.threads
where thread_id < 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PRIMARY NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`THREAD_ID` < 1)
select processlist_id = @conid, name, processlist_info
from performance_schema.threads
where thread_id = @tid;
processlist_id = @conid name processlist_info
1 thread/sql/one_connection <info>
explain select THREAD_ID, NAME from performance_schema.threads
where processlist_id = @conid;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ID PROCESSLIST_ID 9 const 10 100.00 NULL
explain select * from performance_schema.threads
where processlist_id > 99999;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_ID NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_ID` > 99999)
explain select * from performance_schema.threads
where processlist_id < 99999;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_ID NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_ID` < 99999)
select thread_id = @tid, name, processlist_info
from performance_schema.threads
where processlist_id = @conid;
thread_id = @tid name processlist_info
1 thread/sql/one_connection <info>
explain select THREAD_ID, NAME from performance_schema.threads
where thread_os_id = @osid;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref THREAD_OS_ID THREAD_OS_ID 9 const 10 100.00 NULL
explain select * from performance_schema.threads
where thread_os_id > 99999;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL THREAD_OS_ID NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`THREAD_OS_ID` > 99999)
explain select * from performance_schema.threads
where thread_os_id < 99999;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL THREAD_OS_ID NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`THREAD_OS_ID` < 99999)
select thread_id - @tid, name, processlist_info
from performance_schema.threads
where thread_os_id = @osid;
thread_id - @tid name processlist_info
0 thread/sql/one_connection <info>
explain select THREAD_ID from performance_schema.threads
where NAME = "impossible";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref NAME NAME 514 const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`NAME` = 'impossible')
explain select THREAD_ID from performance_schema.threads
where NAME = "thread/sql/main";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref NAME NAME 514 const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`NAME` = 'thread/sql/main')
explain select * from performance_schema.threads
where NAME > "foo";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL NAME NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`NAME` > 'foo')
explain select * from performance_schema.threads
where NAME < "bar";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL NAME NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`NAME` < 'bar')
explain select * from performance_schema.threads
where NAME like "thread/sql/%";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL NAME NULL NULL NULL 256 11.11 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`NAME` like 'thread/sql/%')
select thread_id, name, processlist_state, processlist_info
from performance_schema.threads
where NAME = "thread/sql/main" order by thread_id;
thread_id name processlist_state processlist_info
<thread_id> thread/sql/main <state> <info>
explain select THREAD_ID from performance_schema.threads
where PROCESSLIST_USER = "impossible";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT PROCESSLIST_ACCOUNT 131 const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_USER` = 'impossible')
explain select THREAD_ID from performance_schema.threads
where PROCESSLIST_USER = "root";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT PROCESSLIST_ACCOUNT 131 const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_USER` = 'root')
explain select * from performance_schema.threads
where PROCESSLIST_USER > "foo";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_ACCOUNT NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_USER` > 'foo')
explain select * from performance_schema.threads
where PROCESSLIST_USER < "bar";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_ACCOUNT NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_USER` < 'bar')
explain select * from performance_schema.threads
where PROCESSLIST_USER like "ro%";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_ACCOUNT NULL NULL NULL 256 11.11 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_USER` like 'ro%')
select thread_id, thread_id = @tid, name, processlist_state, processlist_info
from performance_schema.threads
where PROCESSLIST_USER = "root" order by thread_id;
thread_id thread_id = @tid name processlist_state processlist_info
<thread_id> 1 thread/sql/one_connection <state> <info>
explain select THREAD_ID from performance_schema.threads
where PROCESSLIST_USER = "impossible" and PROCESSLIST_HOST = "impossible";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT,PROCESSLIST_HOST PROCESSLIST_ACCOUNT 389 const,const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where ((`performance_schema`.`threads`.`PROCESSLIST_HOST` = 'impossible') and (`performance_schema`.`threads`.`PROCESSLIST_USER` = 'impossible'))
explain select THREAD_ID from performance_schema.threads
where PROCESSLIST_USER = "root" and PROCESSLIST_HOST = "localhost";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT,PROCESSLIST_HOST PROCESSLIST_ACCOUNT 389 const,const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where ((`performance_schema`.`threads`.`PROCESSLIST_HOST` = 'localhost') and (`performance_schema`.`threads`.`PROCESSLIST_USER` = 'root'))
explain select * from performance_schema.threads
where PROCESSLIST_USER = "foo" and PROCESSLIST_HOST < "foo";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT,PROCESSLIST_HOST PROCESSLIST_ACCOUNT 131 const 10 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where ((`performance_schema`.`threads`.`PROCESSLIST_USER` = 'foo') and (`performance_schema`.`threads`.`PROCESSLIST_HOST` < 'foo'))
explain select * from performance_schema.threads
where PROCESSLIST_USER = "foo" and PROCESSLIST_HOST > "bar";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT,PROCESSLIST_HOST PROCESSLIST_ACCOUNT 131 const 10 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where ((`performance_schema`.`threads`.`PROCESSLIST_USER` = 'foo') and (`performance_schema`.`threads`.`PROCESSLIST_HOST` > 'bar'))
explain select * from performance_schema.threads
where PROCESSLIST_USER = "foo" and PROCESSLIST_HOST like "bar%";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_ACCOUNT,PROCESSLIST_HOST PROCESSLIST_ACCOUNT 131 const 10 11.11 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where ((`performance_schema`.`threads`.`PROCESSLIST_USER` = 'foo') and (`performance_schema`.`threads`.`PROCESSLIST_HOST` like 'bar%'))
select thread_id, thread_id = @tid, name, processlist_state, processlist_info
from performance_schema.threads
where PROCESSLIST_USER = "root" and PROCESSLIST_HOST = "localhost" order by thread_id;
thread_id thread_id = @tid name processlist_state processlist_info
<thread_id> 1 thread/sql/one_connection <state> <info>
explain select THREAD_ID from performance_schema.threads
where PROCESSLIST_HOST = "impossible";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_HOST PROCESSLIST_HOST 258 const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_HOST` = 'impossible')
explain select THREAD_ID from performance_schema.threads
where PROCESSLIST_HOST = "localhost";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ref PROCESSLIST_HOST PROCESSLIST_HOST 258 const 10 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_HOST` = 'localhost')
explain select * from performance_schema.threads
where PROCESSLIST_HOST > "foo";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_HOST NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_HOST` > 'foo')
explain select * from performance_schema.threads
where PROCESSLIST_HOST < "bar";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_HOST NULL NULL NULL 256 33.33 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_HOST` < 'bar')
explain select * from performance_schema.threads
where PROCESSLIST_HOST like "local%";
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE threads NULL ALL PROCESSLIST_HOST NULL NULL NULL 256 11.11 Using where
Warnings:
Note 1003 /* select#1 */ select `performance_schema`.`threads`.`THREAD_ID` AS `THREAD_ID`,`performance_schema`.`threads`.`NAME` AS `NAME`,`performance_schema`.`threads`.`TYPE` AS `TYPE`,`performance_schema`.`threads`.`PROCESSLIST_ID` AS `PROCESSLIST_ID`,`performance_schema`.`threads`.`PROCESSLIST_USER` AS `PROCESSLIST_USER`,`performance_schema`.`threads`.`PROCESSLIST_HOST` AS `PROCESSLIST_HOST`,`performance_schema`.`threads`.`PROCESSLIST_DB` AS `PROCESSLIST_DB`,`performance_schema`.`threads`.`PROCESSLIST_COMMAND` AS `PROCESSLIST_COMMAND`,`performance_schema`.`threads`.`PROCESSLIST_TIME` AS `PROCESSLIST_TIME`,`performance_schema`.`threads`.`PROCESSLIST_STATE` AS `PROCESSLIST_STATE`,`performance_schema`.`threads`.`PROCESSLIST_INFO` AS `PROCESSLIST_INFO`,`performance_schema`.`threads`.`PARENT_THREAD_ID` AS `PARENT_THREAD_ID`,`performance_schema`.`threads`.`ROLE` AS `ROLE`,`performance_schema`.`threads`.`INSTRUMENTED` AS `INSTRUMENTED`,`performance_schema`.`threads`.`HISTORY` AS `HISTORY`,`performance_schema`.`threads`.`CONNECTION_TYPE` AS `CONNECTION_TYPE`,`performance_schema`.`threads`.`THREAD_OS_ID` AS `THREAD_OS_ID`,`performance_schema`.`threads`.`RESOURCE_GROUP` AS `RESOURCE_GROUP`,`performance_schema`.`threads`.`EXECUTION_ENGINE` AS `EXECUTION_ENGINE`,`performance_schema`.`threads`.`CONTROLLED_MEMORY` AS `CONTROLLED_MEMORY`,`performance_schema`.`threads`.`MAX_CONTROLLED_MEMORY` AS `MAX_CONTROLLED_MEMORY`,`performance_schema`.`threads`.`TOTAL_MEMORY` AS `TOTAL_MEMORY`,`performance_schema`.`threads`.`MAX_TOTAL_MEMORY` AS `MAX_TOTAL_MEMORY`,`performance_schema`.`threads`.`TELEMETRY_ACTIVE` AS `TELEMETRY_ACTIVE` from `performance_schema`.`threads` where (`performance_schema`.`threads`.`PROCESSLIST_HOST` like 'local%')
select thread_id, thread_id = @tid, name, processlist_state, processlist_info
from performance_schema.threads
where PROCESSLIST_HOST = "localhost" order by (thread_id = @tid), thread_id;
thread_id thread_id = @tid name processlist_state processlist_info
<thread_id> 0 thread/sql/event_scheduler <state> <info>
<thread_id> 1 thread/sql/one_connection <state> <info>
|
