mysql關閉與刪除bin-log日誌詳解

關閉bin-log日誌

當開啟bin-log日誌時，會產生很多mysql-bin.0000*類似的檔案，而且可能會佔用很大的硬碟空間。對於自己的測試機器或硬碟比較緊張的vps，而又不需要做master，slave的配置，完全可以關閉日誌功能。

關閉操作很簡單，找到設定檔my.cnf，對於linux，一般預設在/etc目錄下，開啟此檔案，使用井號(#)注釋掉如下兩個設定項目即可。

代碼如下	複製代碼
log-bin=mysql-bin binlog_format=mixed

例

vi /etc/my.cnf 或my.cnf的路徑

把其中的log-bin=mysql-bin修改為#log-bin=mysql-bin

重啟mysql即可生效。

配置修改好後需要重啟mysqld服務才會生效。

可能在重啟時候會收到一個錯誤，“ERROR 1186 (HY000): Binlog closed, cannot RESET MASTER”，解決辦法是先登入到mysql命令列中執行 reset master 即可。reset master的用途就是刪除先前所以的bin-log記錄檔。所以在master、slave配置環境中慎用此命令。

刪除bin-log日誌

1.尋找當前有哪些二進位記錄檔：

代碼如下

複製代碼

mysql> show binary logs; +------------------+-----------+ | Log_name         | File_size | +------------------+-----------+ | mysql-bin.000001 |   1357315 | | mysql-bin.000002 |       117 | | mysql-bin.000003 |    404002 | | mysql-bin.000004 |   2050722 | | mysql-bin.000005 |    139103 | | mysql-bin.000006 |     46702 | | mysql-bin.000007 |       117 | | mysql-bin.000008 |        98 | | mysql-bin.000009 |       117 | | mysql-bin.000010 |      1254 | | mysql-bin.000011 |       117 | | mysql-bin.000012 |  29394942 | | mysql-bin.000013 |    422100 | | mysql-bin.000014 |       117 | | mysql-bin.000015 |       117 | | mysql-bin.000016 |        98 | | mysql-bin.000017 |       117 | | mysql-bin.000018 |       117 | | mysql-bin.000019 |    285300 | | mysql-bin.000020 |    181229 | | mysql-bin.000021 |        98 | +------------------+-----------+ 21 rows in set (0.03 sec)

2.刪除bin-log(刪除mysql-bin.000018之前的所有二進位記錄檔)

代碼如下

複製代碼

mysql> purge binary logs to 'mysql-bin.000018'; Query OK, 0 rows affected (0.08 sec) mysql> show binary logs; +------------------+-----------+ | Log_name         | File_size | +------------------+-----------+ | mysql-bin.000018 |       117 | | mysql-bin.000019 |    285300 | | mysql-bin.000020 |    181229 | | mysql-bin.000021 |        98 | +------------------+-----------+ 4 rows in set (0.00 sec) mysql> show binlog events; +------------------+-----+-------------+-----------+-------------+---------------------------------------+ | Log_name         | Pos | Event_type  | Server_id | End_log_pos | Info                                  | +------------------+-----+-------------+-----------+-------------+---------------------------------------+ | mysql-bin.000018 |   4 | Format_desc |         1 |          98 | Server ver: 5.0.45-log, Binlog ver: 4 | | mysql-bin.000018 |  98 | Stop        |         1 |         117 |                                       | +------------------+-----+-------------+-----------+-------------+---------------------------------------+ 2 rows in set (0.01 sec)