查詢所有的慢sql(未指定用戶)
```
SELECT * FROM information_schema.processlist WHERE info IS NOT NULL;
```
查詢指定用戶的所有慢sql（command=query正在查詢的，time是耗時（單位：s））
```
SELECT * FROM information_schema.processlist WHERE info IS NOT NULL and USER = "tomorrow";
```
