MYSQl BIN-LOG 日志

今天没事，跑到mysql的目录下转了转，发现了好多mysql-bin.00000X的日志文件。由于偶的这个是自己测试用的，就想看看这些日志文件有什么好玩的。

1.查找当前有哪些二进制日志文件：
mysql> show binary logs;

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

| Log_name | File_size |

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

| mysql-bin.000001 | 125 |

| mysql-bin.000002 | 125 |

| mysql-bin.000003 | 125 |

| mysql-bin.000004 | 125 |

| mysql-bin.000005 | 2332 |

| mysql-bin.000006 | 125 |

| mysql-bin.000007 | 539 |

| mysql-bin.000008 | 1026 |

| mysql-bin.000009 | 732 |

| mysql-bin.000010 | 293 |

| mysql-bin.000011 | 291 |

| mysql-bin.000012 | 889 |

| mysql-bin.000013 | 2710 |

| mysql-bin.000014 | 125 |

| mysql-bin.000015 | 125 |

| mysql-bin.000016 | 125 |

| mysql-bin.000017 | 125 |

| mysql-bin.000018 | 1056 |

| mysql-bin.000019 | 4255 |

| mysql-bin.000020 | 344 |

| mysql-bin.000021 | 125 |

| mysql-bin.000022 | 125 |

| mysql-bin.000023 | 125 |

| mysql-bin.000024 | 106 |

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

24 rows in set (0.17 sec)

还有不少呢。
2.看看日志的信息
mysql> show binlog events;

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

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

| Log_name | Pos | Event_type | Server_id | End_log_pos | Info

|

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

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

| mysql-bin.000001 | 4 | Format_desc | 1 | 106 | Server ver: 5

.1.33-community-log, Binlog ver: 4 |

| mysql-bin.000001 | 106 | Stop | 1 | 125 |

|

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

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

2 rows in set (0.00 sec)

3.删除日志（mysql下的日志是怎么个玩法和oracle的类似不，这个偶还真不知道）
日志能不能删除？偶这个是测试用的删除应该没有问题
mysql> purge binary logs to 'mysql-bin.000020';

Query OK, 0 rows affected (0.05 sec)
把第20之前的删除掉。
mysql> show binary logs;

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

| Log_name | File_size |

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

| mysql-bin.000020 | 344 |

| mysql-bin.000021 | 125 |

| mysql-bin.000022 | 125 |

| mysql-bin.000023 | 125 |

| mysql-bin.000024 | 106 |

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

5 rows in set (0.00 sec)
删除mysql的bin-log文件

cd /var/log/mysql

lognum=`ls -lht |awk '{print $9}'|grep -v index| sort -nr | head -n 1`

/usr/local/mysql/bin/mysql -uroot -p'passwd' -e "purge binary logs to '$lognum' "

上面的脚本来自linuxtone的{北京}silience(17991391)
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