These parameters (located at Service Plans > select a plan > Logs
& Statistics tab) define how statistics and logs of a subscription
should be stored.
Note: These settings in subscriptions are not synchronized with service
plans.
Retain web and traffic statistics
Sets a period (in months) for which reports on the subscription’s web
statistics (generated by the selected web statistics component) and
traffic statistics (generated by Plesk) should be available.
Note: The setting Retain web and traffic statistics is not changed in
subscriptions when you update it for a service plan. The only way to
update this setting for each domain is changing it in the Plesk
database. See this KB
article
for more details.
Log rotation
Enables automatic cleanup and recycling of web server log files. You can
also switch on compression of processed log files and sending them to a
specific email address.