Application Troubleshooting Tools

I have a customer running Nexus 7K/5K/2K with UCS B-Series Chassis with
VMware ESXi 5.X.

Some of him healthcare applications are having intermittent performance
issues where users complaints about slowness.

He doesn't think that it is a network issue, and believes that there is an
issue with the application itself. Intermittent issues are hard to
troubleshoot.

I think it could be an oversubscription issues between the downlinks and
uplinks.

Is there any good application troubleshooting tools that anyone can
recommend?

Thanks,

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Received on Tue May 12 2015 - 23:34:56 ART