CHAPTER 10Resource Monitoring
Identifying performance bottlenecks can be tricky in a virtualization environment. After all, we have many VMs, all executing on the same underlying hardware. How do you identify which VMs are the cause of poor performance and which are not? Some people choose to move VMs to an isolated ESX host and do their performance analysis there. This way, you can see if that particular VM is the source of the problem or the problem is its relationship to others. If a VM is still performing badly when it has access to all the resources of an ESX host, this might indicate the problem is within the guest OS layer, rather than at the virtualization layer.
The key to fixing performance problems in any environment is appreciating ...
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