Performance problems

Poor or slow network performance

1. Isolate which network (such as storage, data, and management) is operating slowly. You might find it helpful to use ping tools or operating-system tools such as a task manager or resource manager.
2. Check for traffic congestion on the network.
3. Update the NIC device driver or the storage device controller device driver.
4. Use the traffic-diagnostic tools that are provided by the I/O-module manufacturer.

Operating-system performance

1. If you have recently made changes to the compute node (for example, updated device drivers or installed software applications), remove the changes.
2. Check for any networking issues.
3. Check the operating-system logs for performance-related errors.
4. Check for events related to high temperatures and power issues; as the compute node might be throttled to help with cooling. If it is throttled, reduce the workload on the compute node to help improve performance.
5. Check for events related to disabled DIMMs. If you do not have enough memory for the application workload, your operating system will have poor performance.
6. Make sure that the workload is not too high for the configuration.