Plesk Advanced Monitoring shows alerts: Memory usage status is critical!

Symptoms

Plesk Administrator receives notifications from Advanced Monitoring:

PLESK_INFO: [Alerting] Apache & php-fpm memory usage
Memory usage status is critical!

PLESK_INFO: [Alerting] IIS memory usage
Memory usage status is critical!

PLESK_INFO: [Alerting] MySQL memory usage

PLESK_INFO: [Alerting] Physical and virtual memory usage

Cause

Memory consumed by the process mentioned in the warning exceeds the threshold configured in Advanced Monitoring settings.

Resolution

If the threshold is lower than presumable service memory consumption (by default it is set to 20%), increase the threshold to a greater value:

1. Log in to Plesk.

2. Go to Advanced Monitoring > Settings > Thresholds.

3. Increase the threshold value for memory usage of the service in question.

4. Apply the changes.

Alternatively, allocate more RAM to the server. For assistance, contact your hosting provider.