Question
What should be performed if I receive a notification from Monitoring about critical disk usage:
Monitoring
[Alerting] Partition "/" utilization
Monitoring
[Alerting] Disk "C:" utilization
Answer
Such notification appears when system resource (Disk usage) reached value configured in Monitoring > Settings > Thresholds:
By default defined threshold value is 80%:
There are two possible situations for this to appear:
- The partition (disk) utilization is expected but the threshold is set too low.
In this case, increase the threshold value for disk utilization in Monitoring > Settings > Thresholds and click Apply - The partition (disk) utilization is unexpected and requires additional actions:
Plesk for Linux:
-
Allow Plesk to remove unnecessary files. Enter https://203.0.113.2:8443/repair/ in the browser search bar, where 203.0.113.2 is Plesk server's public IP, enter Plesk admin credentials and click on Free Up Disk Space
-
Find files and directories, that consuming a lot of space as per the article below: How to find directories/files that take up the most disk space on a Plesk server. Remove some of these files if possible.
-
Remove old backup files via a command-line interface: How to remove Plesk backup files and their logs.
If required, increase the disk space of the server and resize partitioning.
Warning: Disk partitioning is not covered by Plesk Technical Support. If you are not familiar with Linux system administering and would like Plesk professionals to handle this task, please contact Plesk Professional Services team.
If Plesk server is running in a Virtuozzo container (the file /proc/user_beancounters exists on the server), the inode limit can be increased as described in the Virtuozzo article. If you are a container owner, contact your service provider for assistance.
If Plesk server is running in a Vultr virtual machine, it is possible to resize the hard disk of the machine using the official Vultr documentation.
Plesk for Windows:
- Allow Plesk to remove unnecessary files. Enter https://203.0.113.2:8443/repair/ in the browser search bar, where 203.0.113.2 is Plesk server's public IP, enter Plesk admin credentials, and click on Free Up Disk Space
- Free up disk space by locating and removing unnecessary files. Use native Windows tools for that. Enter the following in the search bar to locate files more than 2 Gigabytes:
size:>2G
Use Windows Disk Cleanup tool: Using Disk Cleanup on Windows Server - Remove old backup files, use this KB articles for details: How to remove Plesk backup files and their logs