Tune nodes for low latency by using the cluster performance profile. You can restrict CPUs for infra and application containers, configure huge pages, Hyper-Threading, and configure CPU partitions for latency-sensitive processes.
You can create a cluster performance profile by using the Performance Profile Creator (PPC) tool. The PPC is a function of the Node Tuning Operator.
The PPC combines information about your cluster with user-supplied configurations to generate a performance profile that is appropriate to your hardware, topology and use-case.
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Note
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Performance profiles are applicable only to bare-metal environments where the cluster has direct access to the underlying hardware resources. You can configure performances profiles for both {sno} and multi-node clusters. |
The following is a high-level workflow for creating and applying a performance profile in your cluster:
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Create a machine config pool (MCP) for nodes that you want to target with performance configurations. In {sno} clusters, you must use the
masterMCP because there is only one node in the cluster. -
Gather information about your cluster using the
must-gathercommand. -
Use the PPC tool to create a performance profile by using either of the following methods:
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Run the PPC tool by using Podman.
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Run the PPC tool by using a wrapper script.
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Configure the performance profile for your use case and apply the performance profile to your cluster.
Use the following reference performance profiles as the basis to develop your own custom profiles.
The Node Tuning Operator facilitates reducing NIC queues for enhanced performance. Adjustments are made using the performance profile, allowing customization of queues for different network devices.