Mysql设置主库binlog文件自动清理

mysql主库中设置了打开binlog模式后，会在datadir目录下生成大量的日志文件，mysql默认是不会自动清理的，我们来设置下mysql自动清理binlog文件

一、打开mysql

[root@push-- ~]# mysql -uroot  -p -S /var/lib/mysql//mysql.sock
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.7.-log MySQL Community Server (GPL)

Copyright (c) , , Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

二、 显示binlog文件

mysql> show binary logs;

| master-221.000689 |  |
| master-221.000690 |  |
| master-221.000691 |  |
| master-221.000692 |  |
| master-221.000693 |  |
| master-221.000694 |  |
| master-221.000695 |  |
| master-221.000696 |  |
| master-221.000697 |  |
| master-221.000698 |  |
| master-221.000699 |  |
| master-221.000700 |  |
| master-221.000701 |  |
| master-221.000702 |  |
| master-221.000703 |  |
| master-221.000704 |  |
| master-221.000705 |  |
| master-221.000706 |  |
| master-221.000707 |  |
| master-221.000708 |  |
| master-221.000709 |  |
| master-221.000710 |  |
| master-221.000711 |  |
| master-221.000712 |  |
| master-221.000713 |  |
| master-221.000714 |  |
| master-221.000715 |  |
| master-221.000716 |  |
| master-221.000717 |  |
| master-221.000718 |  |
| master-221.000719 |  |
| master-221.000720 |  |
| master-221.000721 |  |
| master-221.000722 |  |
| master-221.000723 |  |
| master-221.000724 |  |
| master-221.000725 |  |
| master-221.000726 |  |
| master-221.000727 |  |
| master-221.000728 |  |
| master-221.000729 |  |
| master-221.000730 |  |
| master-221.000731 |   |
+-------------------+------------+
 rows in set (0.00 sec)

显示大量的日志文件

通过设置expire_logs_days参数来实现自动删除binlog文件

mysql> show variables like 'expire_logs_days';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| expire_logs_days |      |
+------------------+-------+
 row in set (0.00 sec)

mysql> 

该参数表示binlog日志自动删除/过期的天数，默认值为0，表示不自动删除

设置为10天过期

mysql> set global expire_logs_days=;
Query OK,  rows affected (0.00 sec)

mysql> show variables like 'expire_logs_days';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| expire_logs_days |     |
+------------------+-------+
 row in set (0.00 sec)

mysql>