mysql 8 设置binlog过期时间

mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.22    |
+-----------+
1 row in set (0.01 sec)
mysql> show variables like '%expire%';
+--------------------------------+---------+
| Variable_name                  | Value   |
+--------------------------------+---------+
| binlog_expire_logs_seconds     | 2592000 |
| disconnect_on_expired_password | ON      |
| expire_logs_days               | 0       |
+--------------------------------+---------+
 
默认情况下binglog的失效日期为30天，设置为0则表示永不失效。
以前的参数expire_logs_days废弃不用了。
mysql> set global expire_logs_days=7;
ERROR 3683 (HY000): The option expire_logs_days and binlog_expire_logs_seconds cannot be used together. 
Please use binlog_expire_logs_seconds to set the expire time (expire_logs_days is deprecated)

mysql> set global binlog_expire_logs_seconds=4*24*60*60;
Query OK, 0 rows affected (0.00 sec)
 
mysql> flush logs;
Query OK, 0 rows affected (0.06 sec)


mysql> show binary logs;
说明：
在MySQL 8.0之前 使用的参数expire_logs_days 只能设置到天，在新版本可以精确到秒 。

清理日期之前的binlog日志
mysql> purge binary logs before '2021-22-20 22:00:00';
Query OK, 0 rows affected, 1 warning (0.01 sec)
 
mysql> show binary logs;