Plesk License
Cgroups manager is available for the following Plesk
editions:
- Plesk Web Pro
- Plesk Web Host
If you are using the Web Admin plan and want to manage the resource
consumption of your websites, consider upgrading to Web Pro and
distributing websites among several subscriptions.
Extension License
Cgroups Manager is a paid extension. You can purchase it either
separately or as
a part of the Hosting
Pack.
OS and init system
Cgroups Manager is available for:
- Debian 9, 10
- Ubuntu 16.04, 18.04, 20.04
- CentOS 7, 8
- Red Hat Enterprise Linux 7, 8
By default, all these distributions use the init system called
systemd, which
is required for Cgroups Manager. Although Plesk can also be installed on
Debian with an alternative init system called System
V. To check the current
init system, run cat /proc/1/comm in the command line interface.
Note: If you install the Cgroups Manager on Debian with System V,
Plesk will replace it with systemd. You will have to manually reboot
the system after the installation for the changes to take effect.
Limitations for Debian 8
By default, Cgroups Manager has limited functionality on Debian 8, whose
kernel does not support the cgroups CPU and RAM resource usage
limitations. Read
more
about Cgroups Manager for Debian 8 and possible resolution.
Limitations for Virtuozzo 6 & 7
Plesk installed in a Virtuozzo 6 container can only manage RAM. Plesk in
a Virtuozzo 7 container can manage RAM and the CPU, but not the disk
I/O. Plesk installed on a Virtuozzo virtual machine does not suffer from
these limitations.
If your system does not meet some requirements, you can
migrate
Plesk to a system that meets the requirements.