The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
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 inherit 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
cgroupconfiguration file/etc/cgconfig.conf.By using
cgroupscommands such as cgcreate, cgclassify, and cgexec.By manipulating a cgroup's virtual file system, for example, by adding process IDs to
tasksdirectories under/sys/fs/cgroup.By editing the cgroup rules file
/etc/cgrules.confso that the rules engine or PAM move processes intocgroupsautomatically.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.