Configuring Custom Cgroups

Instead of using the default Cloudera Manager cgroups for resource management, you can configure Custom Cgroups. You must configure these cgroups in the Linux environments of your cluster hosts before enabling Custom Cgroups in Cloudera Manager. You can configure Custom cgroups for all or selected roles of a service.

If you have not already enabled cgroups, enable Resource Management with Control Groups. See Enabling Resource Management with Control Groups.
In the Cloudera Manager Admin Console, go to the service where you want to enable custom cgroups.
Click the Configuration tab.
Select Category > Resource Management.
Locate the Custom Control Group Resources (overrides Cgroup settings) configuration parameter.
To configure cgroups for all roles of the service:
1. Enter the names of the pre-configured cgroups you want to apply to the service. Separate the cgroup names using a single space. Use the following format:
```
<subsystem>:<path>
```
  or
```
<subsystem>,<subsystem>, ...:<path>
```
  This is the same format used to launch processes from the Linux command line using the cgexec command.
  For example, to enable a CPU control group:
```
cpu:myCgroup
```
  For more information, see the documentation for your operating system.
2. Click Save Changes.
3. Restart the service. See Restarting a Cloudera Runtime Service.
To enable a custom cgroup for one or more roles of this service:
1. Click the Edit Individual Values link.
  A text box for each role of this service displays.
2. Enter the names of the pre-configured cgroups you want to apply to each role using the format described in the previous step.
3. Restart each role where you configured a custom cgroup. See Starting, Stopping, and Restarting Role Instances.