Binary Log Expiration

SHOW VARIABLES LIKE 'binlog_expire_logs_seconds';

SHOW VARIABLES LIKE 'expire_logs_days';

expire_logs_days = 0 means binary logs are never automatically deleted based on age.

Check replication format

SHOW VARIABLES LIKE 'binlog_format';

Value	Meaning
`STATEMENT`	Uses SQL statements in the binary log.
`ROW`	Logs each changed row explicitly.
`MIXED`	MySQL chooses `STATEMENT` or `ROW` automatically based on the context.