select count(1) ,user_host from mysql.slow_log group by user_host;

select count(*) from mysql.slow_log ;

mysql> desc mysql.slow_log ;

+----------------+---------------------+------+-----+-------------------+-----------------------------+

| Field | Type | Null | Key | Default | Extra |

+----------------+---------------------+------+-----+-------------------+-----------------------------+

| start_time | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |

| user_host | mediumtext | NO | | NULL | |

| query_time | time | NO | | NULL | |

| lock_time | time | NO | | NULL | |

| rows_sent | int(11) | NO | | NULL | |

| rows_examined | int(11) | NO | | NULL | |

| db | varchar(512) | NO | | NULL | |

| last_insert_id | int(11) | NO | | NULL | |

| insert_id | int(11) | NO | | NULL | |

| server_id | int(10) unsigned | NO | | NULL | |

| sql_text | mediumtext | NO | | NULL | |

| thread_id | bigint(21) unsigned | NO | | NULL | |

+----------------+---------------------+------+-----+-------------------+-----------------------------+

mysql> select query_time,sql_text from mysql.slow_log order by query_time desc limit 30; -- 慢查詢安裝時間排序

mysql> select query_time,sql_text from mysql.slow_log where query_time >'00:00:10'; --查詢大於10s的慢查詢

AWS RDS for MySQL 基本維護