Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Legal Notices
A cgroup is a collection of processes (tasks) that you bind together by applying a set of criteria that control the cgroup's access to system resources. You can create a hierarchy of cgroups, in which child cgroups inherits its characteristics from the parent cgroup. You can use cgroups to manage processes in the following ways:
Limit the CPU, I/O, and memory resources that are available to a group.
Change the priority of a group relative to other groups.
Measure a group's resource usage for accounting and billing purposes.
Isolate a group's files, processes, and network connections from other groups.
Freeze a group to allow you to create a checkpoint.
You can create and manage cgroups in the following ways:
By editing the cgroup configuration file /etc/cgconfig.conf.
By using cgroups commands such as cgcreate, cgclassify, and cgexec.
By manipulating a cgroup's virtual file system, for example, by adding process IDs
to tasks directories under /sys/fs/cgroup.
By editing the cgroup rules file /etc/cgrules.conf so that the
rules engine or PAM move processes into cgroups automatically.
By using additional application software such as Linux Containers.
By using the APIs that are provided in libvirt.
Because you might ultimately want to deploy cgroups in a production environment, this
chapter demonstrates how to configure cgroups by editing the
/etc/cgconfig.conf and /etc/cgrules.conf files, and
how to configure PAM to associate processes with cgroups.
To use cgroups, you must install the
libcgroup package on your system.
Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Legal Notices