mysql清理binlog日志

mysql的binlog日志过多过大，清理过程。

1.查看binlog日志

mysql> show binary logs;
+------------------+-----------+
| Log_name         | File_size |
+------------------+-----------+
| mysql-bin.000001 |  13255920 |
| mysql-bin.000002 |    143716 |
| mysql-bin.000003 | 524288119 |
| mysql-bin.000004 | 524288076 |
| mysql-bin.000005 | 520461264 |
| mysql-bin.000006 |   4768739 |
| mysql-bin.000007 | 469726614 |
| mysql-bin.000008 | 524291087 |
| mysql-bin.000009 | 524288353 |
| mysql-bin.000010 | 524289342 |
| mysql-bin.000011 | 524288703 |
| mysql-bin.000012 | 274820426 |
+------------------+-----------+
12 rows in set (0.00 sec)

2.删除某个日志文件之前的所有日志文件

mysql> purge binary logs to 'mysql-bin.000012';
Query OK, 0 rows affected (0.59 sec)

mysql> show binary logs;
+------------------+-----------+
| Log_name         | File_size |
+------------------+-----------+
| mysql-bin.000012 | 275418857 |
+------------------+-----------+
1 row in set (0.00 sec)

3.重置日志

mysql> reset master;
Query OK, 0 rows affected (0.21 sec)

mysql> show binary logs;
+------------------+-----------+
| Log_name         | File_size |
+------------------+-----------+
| mysql-bin.000001 |      5059 |
+------------------+-----------+
1 row in set (0.00 sec)

注意，如果是主从复制，修改主后，slave上会报错，需要在slave重新设置同步。

slave操作：

mysql> stop salve;
mysql>change master to master_host='192.168.100.10',master_user='rep',master_password='123456', master_log_file='mysql-bin.000001',master_log_pos=5059;
mysql> show slave statusG;