Red Hat Enterprise Linux 6

Resource Management Guide

Managing system resources on Red Hat Enterprise Linux 6

Edition 6

Milan Navrátil

Red Hat Customer Content Services

Marie Doleželová

Red Hat Customer Content Services

Peter Ondrejka

Red Hat Customer Content Services

Eva Majoršinová

Red Hat Customer Content Services

Martin Prpič

Red Hat Product Security

Rüdiger Landmann

Red Hat Customer Content Services

Douglas Silas

Red Hat Customer Content Services

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Managing system resources on Red Hat Enterprise Linux 6.
1. Document Conventions
1.1. Typographic Conventions
1.2. Pull-quote Conventions
1.3. Notes and Warnings
2. Getting Help and Giving Feedback
2.1. Do You Need Help?
2.2. We Need Feedback
1. Introduction to Control Groups (Cgroups)
1.1. How Control Groups Are Organized
1.2. Relationships Between Subsystems, Hierarchies, Control Groups and Tasks
1.3. Implications for Resource Management
2. Using Control Groups
2.1. The cgconfig Service
2.1.1. The /etc/cgconfig.conf File
2.1.2. The /etc/cgconfig.d/ Directory
2.2. Creating a Hierarchy and Attaching Subsystems
2.3. Attaching Subsystems to, and Detaching Them from, an Existing Hierarchy
2.4. Unmounting a Hierarchy
2.5. Creating Control Groups
2.6. Removing Control Groups
2.7. Setting Parameters
2.8. Moving a Process to a Control Group
2.8.1. The cgred Service
2.9. Starting a Process in a Control Group
2.9.1. Starting a Service in a Control Group
2.9.2. Process Behavior in the Root Control Group
2.10. Generating the /etc/cgconfig.conf File
2.10.1. Blacklisting Parameters
2.10.2. Whitelisting Parameters
2.11. Obtaining Information About Control Groups
2.11.1. Finding a Process
2.11.2. Finding a Subsystem
2.11.3. Finding Hierarchies
2.11.4. Finding Control Groups
2.11.5. Displaying Parameters of Control Groups
2.12. Unloading Control Groups
2.13. Using the Notification API
2.14. Additional Resources
3. Subsystems and Tunable Parameters
3.1. blkio
3.1.1. Proportional Weight Division Tunable Parameters
3.1.2. I/O Throttling Tunable Parameters
3.1.3. blkio Common Tunable Parameters
3.1.4. Example Usage
3.2. cpu
3.2.1. CFS Tunable Parameters
3.2.2. RT Tunable Parameters
3.2.3. Example Usage
3.3. cpuacct
3.4. cpuset
3.5. devices
3.6. freezer
3.7. memory
3.7.1. Example Usage
3.8. net_cls
3.9. net_prio
3.10. ns
3.11. perf_event
3.12. Common Tunable Parameters
3.13. Additional Resources
4. Control Group Application Examples
4.1. Prioritizing Database I/O
4.2. Prioritizing Network Traffic
4.3. Per-group Division of CPU and Memory Resources
A. Revision History