For each site, Apache writes access and error information to log files. Each site has two log files -
error_log, which store information on access to that site and errors respectively. Apache log files for each site are located in the
/statistics/logs subdirectory of the virtual host directory
>, where domain_name is the name of a corresponding domain.
To save disk space, Plesk rotates Apache logs. Learn how to change log rotation parameters in the Log rotation section.