Health Monitor in Plesk shows high CPU usage for some services

Symptoms

• Plesk Health Monitor shows high CPU usage for some services;

• Load on CPU is shown as the following:

  Mail server CPU usage 28.96% (of 1600%, 16 core(s))

• In Task Manager > Services MailEnalble SMTP Connector service takes 2-3% of CPU resources.

• In the custom-health-config.xml configuration file downloaded from Health Monitoring > Download Configuration file alarm limits set as:

  <service name="Mail" monitor="true">
   <alarm level="red" threshold="25" type="absolute"/> 
   <alarm level="yellow" threshold="20" type="absolute"/>

Cause

Incorrect alarm levels for CPU in Health Monitor.

Resolution

Change Alarm level according to the percentage on the server.

For example: if there are 16 cores and the maximum percentage is 1600%, limits in the Configuration file should be set as 20*16=320.