Changing expire_log_days in MYSQL

In MySQL 5.6, you would want to show what your expire_logs_days is set to first. Then confirm that the master doesnt need to keep these logs more than x amount of days. Word of caution, having binary logs that low in days can be a big risk.

Set globally as:

mysql> show variables like 'expire_logs_days';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| expire_logs_days | 5     |
+------------------+-------+
1 row in set (0.00 sec)
mysql> set global expire_logs_days=1;
Query OK, 0 rows affected (0.62 sec)
mysql> show variables like 'expire_logs_days';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| expire_logs_days | 1     |
+------------------+-------+
1 row in set (0.00 sec)
Then dont forget to update the my.cnf file if you want this setting to remain or survive a service restart:

$ sudo vim /etc/mysql/my.cnf
    expire_logs_days               = 1
Then flush the current log and to have the binary log statement to take effect on all the logs older than 1 day, in your case:

mysql> flush binary logs;