红帽全球峰会18.2. Optimizing virtual machine performance by using TuneD
The TuneD utility is a tuning profile delivery mechanism that adapts RHEL for certain workload characteristics, such as requirements for CPU-intensive tasks or storage-network throughput responsiveness. It provides a number of tuning profiles that are pre-configured to enhance performance and reduce power consumption in a number of specific use cases. You can edit these profiles or create new profiles to create performance solutions tailored to your environment, including virtualized environments.
To optimize RHEL 10 for virtualization, use the following profiles:
-
For RHEL 10 virtual machines, use the virtual-guest profile. It is based on the generally applicable
throughput-performanceprofile, but also decreases the swappiness of virtual memory. - For RHEL 10 virtualization hosts, use the virtual-host profile. This enables more aggressive writeback of dirty memory pages, which benefits the host performance.
Prerequisites
-
The
TuneDservice is installed and enabled.
Procedure
List the available
TuneDprofiles.# tuned-adm list Available profiles: - balanced - General non-specialized TuneD profile - desktop - Optimize for the desktop use-case [...] - virtual-guest - Optimize for running inside a virtual guest - virtual-host - Optimize for running KVM guests Current active profile: balancedOptional: Create a new
TuneDprofile or edit an existingTuneDprofile.For more information, see Managing TuneD profiles.
Activate a
TuneDprofile.# tuned-adm profile selected-profileTo optimize a virtualization host, use the virtual-host profile.
# tuned-adm profile virtual-hostOn a RHEL guest operating system, use the virtual-guest profile.
# tuned-adm profile virtual-guest
Verification
Display the active profile for
TuneD.# tuned-adm active Current active profile: virtual-hostEnsure that the
TuneDprofile settings have been applied on your system.# tuned-adm verify Verification succeeded, current system settings match the preset profile. See tuned log file ('/var/log/tuned/tuned.log') for details.
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