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.
Linux containers use cgroups in their implementation, and you can use the lxc-cgroup command to control the access that a container has to system resources relative to other containers. For example, to display the CPU cores to which a container can run on, enter:
[root@host ~]# lxc-cgroup -n ol6ctr1 cpuset.cpus
0-7
To restrict a container to cores 0 and 1, you would enter a command such as the following:
[root@host ~]# lxc-cgroup -n ol6ctr1 cpuset.cpus 0,1
To change a container's share of CPU time and block I/O access, you would enter:
[root@host ~]#lxc-cgroup -n ol6ctr2 cpu.shares 256
[root@host ~]#lxc-cgroup -n ol6ctr2 blkio.weight 500
Limit a container to 256 MB of memory when the system detects memory contention or low memory; otherwise, set a hard limit of 512 MB:
[root@host ~]#lxc-cgroup -n ol6ctr2 memory.soft_limit_in_bytes 268435456
[root@host ~]#lxc-cgroup -n ol6ctr2 memory.limit_in_bytes 53687091
To make the changes to a container's configuration permanent, add
the settings to the file
/container/
,
for example:
name
/config
# Permanently tweaked resource settings lxc.cgroup.cpu.shares=256 lxc.cgroup.blkio.weight=500
For more information, see Chapter 10, Control Groups.