查看事件执行日志

mysql> select * from test.t_event_history;（http://www.amjmh.com）
+--------+-----------+-------------------------+-------------------------+-----------+----------+--------------+--------+
| dbname | eventname | starttime               | endtime                 | issuccess | duration | errormessage | randno |
+--------+-----------+-------------------------+-------------------------+-----------+----------+--------------+--------+
| test   | ev1       | 2019-07-31 14:38:04.000 | 2019-07-31 14:38:09.389 |         1 |  5389000 | NULL         |   NULL |
| test   | ev2       | 2019-07-31 14:38:04.000 | 2019-07-31 14:38:09.344 |         1 |  5344000 | NULL         |   NULL |
| test   | ev3       | 2019-07-31 14:38:05.000 | 2019-07-31 14:38:09.230 |         1 |  4230000 | NULL         |   NULL |
| test   | ev4       | 2019-07-31 14:38:05.000 | 2019-07-31 14:38:09.344 |         1 |  4344000 | NULL         |   NULL |
+--------+-----------+-------------------------+-------------------------+-----------+----------+--------------+--------+
4 rows in set (0.00 sec)
        可以看到，每个过程的执行均为4.83秒，又因为是并行执行的，因此总的执行之间为最慢的5.3秒，优化效果和shell后台进程方式几乎相同。
 
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