- Plesk 17.8 for Linux
In Plesk 17.8, domains's access logfile access_log.processed located at /var/www/vhosts/example.com/logs/ gets overwritten everyday despite the fact that domain logs are configured to be rotated by size.
This is a Plesk bug with ID PPPM-8502, which is planned to be fixed in future product updates.
As workaround, set a smaller log rotation size (e.g. 1 KB) for domain logs.