Monitoring and Tuning Your Server
Monitoring and Tuning Your Server |
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You can chart the Process\ Thread Count: Inetinfo value over time to see how many threads the Inetinfo process creates and how the numbers of threads vary. Then, observe the processor time for each thread in the process (Thread\ % Processor Time: Inetinfo => Thread #) during periods of high, medium, and low server activity (as indicated by the other performance measures).
You should also observe the patterns of context switches over time, which indicate that the kernel has switched the processor from one thread to another. A context switch occurs each time a new thread runs, and each time one thread takes over from another. A large number of threads is likely to increase the number of context switches. While they allow multiple threads to share the processor, content switches also interrupt the processor and might interfere with its performance, especially on multiprocessor computers. As long as processor utilization is under 70 percent, however, this is not an issue.