High CPU usage occurs during Plesk Daily Maintenance task execution on a Plesk server

Anton Kuznetsov

Updated July 18, 2023 02:04

Plesk for Linux kb: technical ABT: Group A

Applicable to:

Plesk for Linux

Symptoms

RHEL-based OS is installed in the server.
High CPU usage occurs around Plesk Daily Maintenance task execution time.
Plesk Administrator receives the notification mails from Health Monitor about high Apache CPU usage and sw-engine processes are in top

Cause

AWstats package is corrupted.

The process like the following one consumes all the CPU:

20936 ? RN 0:19 \_ /usr/bin/perl /usr/lib64/plesk-9.0/logresolvemerge

All the domains that use AWstat as webstatistics tool have access_log.webstat files with non-zero size, for some of them it can be about several GBs. As a result, access_log.webstat files are not being processed properly and its size increases permanently. Parsing of such files during execution of Daily Maintenance task consumes a lot of CPU.

Resolution

Re-install AWstats feature using Plesk Installer at Tools & Settings > Updates.

Click on a section to expand

If solution does not help::

Connect to the server via SSH
Find all the domains that use AWstats and truncate files to zero size:

# plesk db -Nse "select d.name from domains d, hosting h where d.id=h.dom_id and h.webstat='awstats';" | xargs -i find /var/www/vhosts/system/{}/logs/ -type f -name "*.webstat" | xargs -i truncate --size 0 {}