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)