When you install XenApp on a Windows server, the setup adds some new performance counters that you can access from Windows Performance Monitor. A regular analysis of performance data helps to identify possible bottlenecks or lack of free resources.
It's difficult to define which values are good for the counters in advance; this usually depends on the size of the infrastructure, the number of connected users, and so on. A better approach is to record the values during normal conditions (baselining) and compare the actual values with the baseline.
Citrix performance counters are grouped into six sections. In the next section, you will find descriptions of the most significant counters.