To configure logs in the Plesk please follow the following steps:-
1) Login to Plesk control Panel.
2) Click the "Domains" shortcut in the navigation panel.
3) Click the required domain name in the list.
4) Click on "Log Manager".
5) Click on "Log rotation".
6) Click Switch On in the Tools group. If you see only Switch Off there, this means that
log recycling is already switched on. Specify when to recycle log files and how many
instances of each log file to store on the server. Also specify whether they should
be compressed or not and sent to an e-mail address after processing.Click on "OK"
once you have made the required setings.