Purge logs of MySQL

The PURGE BINARY LOGS statement deletes all the binary log files listed in the log index file prior to the specified log file name or date. BINARY and MASTER are synonyms. Deleted log files also are removed from the list recorded in the index file, so that the given log file becomes the first in the list.

Examples:-

mysql> SHOW BINARY LOGS;
+------------------+-----------+
| Log_name         | File_size |
+------------------+-----------+
| mysql-bin.000034 |  14785707 |
| mysql-bin.000035 |       143 |
| mysql-bin.000036 |       143 |
| mysql-bin.000037 |       120 |
+------------------+-----------+
4 rows in set (0.00 sec)

mysql> PURGE BINARY LOGS BEFORE '2014-09-10';

mysql> PURGE BINARY LOGS BEFORE '2013-04-22 09:55:22';

mysql>PURGE BINARY LOGS TO 'mysql-bin.000015';


ref : https://mariadb.com/kb/en/mariadb/documentation/sql-commands/administration-commands/sql-commands-purge-logs/