Manticore Search accepts signal USR1 for reopening server and query log files.

The official DEB and RPM packages install a Logrotate conf file for all files in default log folder.

A simple logrotate conf for log files looks like:

/var/log/manticore/*.log {
       weekly
       rotate 10
       copytruncate
       delaycompress
       compress
       notifempty
       missingok
}

mysql> FLUSH LOGS;
Query OK, 0 rows affected (0.01 sec)

In addition, the FLUSH LOGS SQL command is available, which works same as system USR1 signal. Initiate reopen of searchd log and query log files, letting you implement log file rotation. Command is non-blocking (i.e., returns immediately).