Performance Monitoring

Performance monitoring can be done via several tools that are available within the VM Server system. Remember, the domain-0 (dom0) system is not a normal virtual machine, though it has some of the properties of a virtual machine. For example, running top, sar, or vmstat (Linux monitoring utilities) in dom0 only provides statistics for dom0 itself. To determine what is happening on the entire VM Server, you must use other utilities. Let’s look at a couple of examples.

Running top (Display Top Linux Tasks) in dom0 gives you information on the dom0 system only. You can see this in Figure 14-1. In Figure 14-1, top shows a system with 1 CPU and 557056k of total system memory. The VM Server used in this example actually has 1GB ...

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