系统表介绍
events_stages_history_long 表包含历史捕获的SQL运行时各种阶段性事件， 该表用一行记录描述一个线程最近被监测到的阶段性事件。
每个线程记录的数量受参数“performance_schema_events_stages_history_size” 控制
| 列名 | 含义 |
|---|---|
| THREAD_ID | 线程ID |
| EVENT_ID | 事件ID |
| END_EVENT_ID | 阶段结束事件ID 当事件结束后，发生启动修改线程当前事件号时置为空 |
| EVENT_NAME | 事件名称 |
| SOURCE | 包含监测器的源码文件 |
| TIMER_START | 事件启动的时间 |
| TIMER_END | 事件结束的时间 |
| TIMER_WAIT | 事件持续时长 TIMER_END-TIMER_START 单位是皮秒 百万分之一微秒 |
| WORK_COMPLETED | 工作单元被完成的数量 |
| WORK_ESTIMATED | 预计需要被完成的工作数量 |
| NESTING_EVENT_ID | 嵌套事件编号 |
| NESTING_EVENT_TYPE | 嵌套事件类型 |
实例
mysql> select * from events_stages_history_long where thread_id = 360 ;
+-----------+----------+--------------+--------------------------------+--------+----------------------+----------------------+------------+----------------+----------------+------------------+--------------------+
| THREAD_ID | EVENT_ID | END_EVENT_ID | EVENT_NAME | SOURCE | TIMER_START | TIMER_END | TIMER_WAIT | WORK_COMPLETED | WORK_ESTIMATED | NESTING_EVENT_ID | NESTING_EVENT_TYPE |
+-----------+----------+--------------+--------------------------------+--------+----------------------+----------------------+------------+----------------+----------------+------------------+--------------------+
| 360 | 164 | 164 | stage/sql/end | | 12412681059473517000 | 12412681060076654000 | 603137000 | NULL | NULL | 162 | STATEMENT |
| 360 | 165 | 166 | stage/sql/query end | | 12412681060076654000 | 12412681060981723000 | 905069000 | NULL | NULL | 162 | STATEMENT |
| 360 | 167 | 170 | stage/sql/closing tables | | 12412681060981723000 | 12412681061009894000 | 28171000 | NULL | NULL | 162 | STATEMENT |
| 360 | 171 | 172 | stage/sql/freeing items | | 12412681061009894000 | 12412681061216547000 | 206653000 | NULL | NULL | 162 | STATEMENT |
| 360 | 173 | 174 | stage/sql/cleaning up | | 12412681061216547000 | 12412681061218725000 | 2178000 | NULL | NULL | 162 | STATEMENT |
| 360 | 178 | 182 | stage/sql/starting | | 12412681069485776000 | 12412681069620449000 | 134673000 | NULL | NULL | 177 | STATEMENT |
| 360 | 183 | 184 | stage/sql/cleaning up | | 12412681069620449000 | 12412681069622425000 | 1976000 | NULL | NULL | 177 | STATEMENT |
| 360 | 188 | 193 | stage/sql/starting | | 12412681069937401000 | 12412681070021877000 | 84476000 | NULL | NULL | 187 | STATEMENT |
| 360 | 194 | 194 | stage/sql/checking permissions | | 12412681070021877000 | 12412681070024965000 | 3088000 | NULL | NULL | 187 | STATEMENT |
| 360 | 195 | 195 | stage/sql/Opening tables | | 12412681070024965000 | 12412681070029071000 | 4106000 | NULL | NULL | 187 | STATEMENT |
| 360 | 196 | 197 | stage/sql/init | | 12412681070029071000 | 12412681070043468000 | 14397000 | NULL | NULL | 187 | STATEMENT |
| 360 | 198 | 199 | stage/sql/optimizing | | 12412681070043468000 | 12412681070047422000 | 3954000 | NULL | NULL | 187 | STATEMENT |
| 360 | 200 | 200 | stage/sql/executing | | 12412681070047422000 | 12412681070055160000 | 7738000 | NULL | NULL | 187 | STATEMENT |
| 360 | 201 | 201 | stage/sql/end | | 12412681070055160000 | 12412681070056582000 | 1422000 | NULL | NULL | 187 | STATEMENT |
| 360 | 202 | 203 | stage/sql/query end | | 12412681070056582000 | 12412681070059780000 | 3198000 | NULL | NULL | 187 | STATEMENT |
| 360 | 204 | 204 | stage/sql/closing tables | | 12412681070059780000 | 12412681070061109000 | 1329000 | NULL | NULL | 187 | STATEMENT |
| 360 | 205 | 206 | stage/sql/freeing items | | 12412681070061109000 | 12412681070133668000 | 72559000 | NULL | NULL | 187 | STATEMENT |
| 360 | 207 | 208 | stage/sql/cleaning up | | 12412681070133668000 | 12412681070135291000 | 1623000 | NULL | NULL | 187 | STATEMENT |
| 360 | 212 | 216 | stage/sql/starting | | 12412759149445214000 | 12412759149617861000 | 172647000 | NULL | NULL | 211 | STATEMENT |
| 360 | 217 | 218 | stage/sql/cleaning up | | 12412759149617861000 | 12412759149619861000 | 2000000 | NULL | NULL | 211 | STATEMENT |
| 360 | 222 | 227 | stage/sql/starting | | 12412759149994682000 | 12412759150064330000 | 69648000 | NULL | NULL | 221 | STATEMENT |
| 360 | 228 | 228 | stage/sql/checking permissions | | 12412759150064330000 | 12412759150067272000 | 2942000 | NULL | NULL | 221 | STATEMENT |
| 360 | 229 | 229 | stage/sql/Opening tables | | 12412759150067272000 | 12412759150071507000 | 4235000 | NULL | NULL | 221 | STATEMENT |
| 360 | 230 | 231 | stage/sql/init | | 12412759150071507000 | 12412759150125435000 | 53928000 | NULL | NULL | 221 | STATEMENT |
| 360 | 232 | 233 | stage/sql/optimizing | | 12412759150125435000 | 12412759150129925000 | 4490000 | NULL | NULL | 221 | STATEMENT |
| 360 | 234 | 234 | stage/sql/executing | | 12412759150129925000 | 12412759150137683000 | 7758000 | NULL | NULL | 221 | STATEMENT |
| 360 | 235 | 235 | stage/sql/end | | 12412759150137683000 | 12412759150139193000 | 1510000 | NULL | NULL | 221 | STATEMENT |
| 360 | 236 | 237 | stage/sql/query end | | 12412759150139193000 | 12412759150142587000 | 3394000 | NULL | NULL | 221 | STATEMENT |
| 360 | 238 | 238 | stage/sql/closing tables | | 12412759150142587000 | 12412759150144119000 | 1532000 | NULL | NULL | 221 | STATEMENT |
| 360 | 239 | 240 | stage/sql/freeing items | | 12412759150144119000 | 12412759150235907000 | 91788000 | NULL | NULL | 221 | STATEMENT |
| 360 | 241 | 242 | stage/sql/cleaning up | | 12412759150235907000 | 12412759150237407000 | 1500000 | NULL | NULL | 221 | STATEMENT |
| 360 | 246 | 250 | stage/sql/starting | | 12412759151011487000 | 12412759151090522000 | 79035000 | NULL | NULL | 245 | STATEMENT |
| 360 | 251 | 252 | stage/sql/cleaning up | | 12412759151090522000 | 12412759151091814000 | 1292000 | NULL | NULL | 245 | STATEMENT |
| 360 | 256 | 260 | stage/sql/starting | | 12412759151445400000 | 12412759151519782000 | 74382000 | NULL | NULL | 255 | STATEMENT |
| 360 | 261 | 262 | stage/sql/cleaning up | | 12412759151519782000 | 12412759151521152000 | 1370000 | NULL | NULL | 255 | STATEMENT |
| 360 | 266 | 271 | stage/sql/starting | | 12412759151825711000 | 12412759151874988000 | 49277000 | NULL | NULL | 265 | STATEMENT |
| 360 | 272 | 273 | stage/sql/checking permissions | | 12412759151874988000 | 12412759151882955000 | 7967000 | NULL | NULL | 265 | STATEMENT |
| 360 | 274 | 276 | stage/sql/Opening tables | | 12412759151882955000 | 12412759151909295000 | 26340000 | NULL | NULL | 265 | STATEMENT |
| 360 | 277 | 277 | stage/sql/init | | 12412759151909295000 | 12412759151926195000 | 16900000 | NULL | NULL | 265 | STATEMENT |
| 360 | 278 | 280 | stage/sql/System lock | | 12412759151926195000 | 12412759151938527000 | 12332000 | NULL | NULL | 265 | STATEMENT |
| 360 | 281 | 282 | stage/sql/updating | | 12412759151938527000 | 12412759152644403000 | 705876000 | NULL | NULL | 265 | STATEMENT |
| 360 | 283 | 283 | stage/sql/end | | 12412759152644403000 | 12412759152651918000 | 7515000 | NULL | NULL | 265 | STATEMENT |
| 360 | 284 | 285 | stage/sql/query end | | 12412759152651918000 | 12412759152654098000 | 2180000 | NULL | NULL | 265 | STATEMENT |
| 360 | 286 | 289 | stage/sql/closing tables | | 12412759152654098000 | 12412759152727797000 | 73699000 | NULL | NULL | 265 | STATEMENT |
| 360 | 290 | 291 | stage/sql/freeing items | | 12412759152727797000 | 12412759152811605000 | 83808000 | NULL | NULL | 265 | STATEMENT |
| 360 | 292 | 293 | stage/sql/cleaning up | | 12412759152811605000 | 12412759152813210000 | 1605000 | NULL | NULL | 265 | STATEMENT |
| 360 | 297 | 301 | stage/sql/starting | | 12412759158530857000 | 12412759158668384000 | 137527000 | NULL | NULL | 296 | STATEMENT |
| 360 | 302 | 303 | stage/sql/cleaning up | | 12412759158668384000 | 12412759158670488000 | 2104000 | NULL | NULL | 296 | STATEMENT |
| 360 | 307 | 312 | stage/sql/starting | | 12412759158912120000 | 12412759158962074000 | 49954000 | NULL | NULL | 306 | STATEMENT |
| 360 | 313 | 313 | stage/sql/checking permissions | | 12412759158962074000 | 12412759158965197000 | 3123000 | NULL | NULL | 306 | STATEMENT |
| 360 | 314 | 314 | stage/sql/Opening tables | | 12412759158965197000 | 12412759158969544000 | 4347000 | NULL | NULL | 306 | STATEMENT |
| 360 | 315 | 316 | stage/sql/init | | 12412759158969544000 | 12412759158982738000 | 13194000 | NULL | NULL | 306 | STATEMENT |
| 360 | 317 | 318 | stage/sql/optimizing | | 12412759158982738000 | 12412759158986834000 | 4096000 | NULL | NULL | 306 | STATEMENT |
| 360 | 319 | 319 | stage/sql/executing | | 12412759158986834000 | 12412759158994762000 | 7928000 | NULL | NULL | 306 | STATEMENT |
| 360 | 320 | 320 | stage/sql/end | | 12412759158994762000 | 12412759158996250000 | 1488000 | NULL | NULL | 306 | STATEMENT |
| 360 | 321 | 322 | stage/sql/query end | | 12412759158996250000 | 12412759158999455000 | 3205000 | NULL | NULL | 306 | STATEMENT |
| 360 | 323 | 323 | stage/sql/closing tables | | 12412759158999455000 | 12412759159000572000 | 1117000 | NULL | NULL | 306 | STATEMENT |
| 360 | 324 | 325 | stage/sql/freeing items | | 12412759159000572000 | 12412759159076303000 | 75731000 | NULL | NULL | 306 | STATEMENT |
| 360 | 326 | 327 | stage/sql/cleaning up | | 12412759159076303000 | 12412759159077921000 | 1618000 | NULL | NULL | 306 | STATEMENT |
+-----------+----------+--------------+--------------------------------+--------+----------------------+----------------------+------------+----------------+----------------+------------------+--------------------+
59 rows in set (0.00 sec)
查看参数
mysql> show variables like 'performance_schema_events_stages_history_long_size' ;
+----------------------------------------------------+-------+
| Variable_name | Value |
+----------------------------------------------------+-------+
| performance_schema_events_stages_history_long_size | 10000 |
+----------------------------------------------------+-------+
1 row in set (0.00 sec)