How should KSM be enabled in a RHEV environment?
Issue
- How should KSM be enabled in a RHEV environment? In the RHEV 2.2 update the Host field now has a place for its status.
- Which values should be used for the number of pages and sleep value?
- ksmd is stopped but ksmtuned is started.
- Why is KSM not working on my RHEL Virtualization Host?
- Even in a high loaded system, KSM page de-duplication is not working. Both
/sys/kernel/mm/ksm/pages_sharingand/sys/kernel/mm/ksm/pages_sharedare reporting 0.
Environment
- Red Hat Enterprise Linux
- Red Hat Enterprise Virtualization 3.2 and earlier
NOTE: For RHEV 3.3, please refer to this solution: In RHEV 3.3, ksmtuned service is stopped. So, how is KSM being controlled?
NOTE: For RHV 4.0, we recommend using management interface as the preferred way for changing KSM configuration: RHV 4.0 Administration Guide, section 5.2.2.2. Optimization Settings Explained
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