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How to troubleshoot Network Performance issues in Oracle VM (Doc ID 2160922.1)

Last updated on MARCH 05, 2025

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Oracle VM - Version 3.2.1 to 3.4.1 [Release OVM32 to OVM34]
Private Cloud Appliance - Version 2.3.4 to 2.3.4 [Release 2.0]
Linux x86-64
Linux x86

Goal

How to troubleshoot network performance issues in Oracle VM between:

This document is designed to determine if network performance is being affected by RAW Network speed.

Solution

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In this Document
Goal
Solution
 1. Don't use scp/sftp to measure Network Performance in Oracle VM
 2. Make sure that both the domU and dom0 have all network tuning parameters set properly
 3. Try different bonding modes if possible
 4. Prepare proper troubleshooting test case
 5. Use iperf for testing network performance
 UDP test
 TCP test
 6. Make sure LRO/GRO features are disabled
 7. Verify any Switch/Router/Firewall in the middle of traffic
 8. Use tcpdump to debug any issues between Source and Destination 
 9. Make sure that latest kernel is installed on domU and OVS while performing any network test
 10. Check different virtualization type for domU
 11. Make sure there are no issues on OVS and domU
 12. Irqblanace
 Conclusion
References


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