Server Work Queues of networking

 This is something you should only measure on your Terminal Server(s). You should monitor the "current commands" in the Redirector object. If the value is higher than 20 during sustained periods of time then you could have a bottleneck.

Server Work Queues
The Server Work Queues object should be monitored on the File server. You should monitor the "Available WorkItems" counter. Sustained values smaller than ten mean that the File server is running out of work items. When it does, performance really starts to plummet. Make sure this doesn't happen by upping the MinFreeworkItems value.

Server
In this object there's a counter called "Work Item Shortages". This value represents the number of times no work items were available or couldn't be allocated to service a file request. Obviously if you see any other value than zero, you need to start worrying. Upping the InitWorkItems or MaxWorkItems could help out here.

Again, there's so much more you can monitor but interpreting the results depends heavily on your environment. Just browsing the performance monitor objects I mentioned and playing around with it will give you a lot more information.

Tuning
So what do I set these registry values to? Unfortunately it’s not that simple. For starters, it depends on your specific environment. Also, an unfortunately side effect of almost every one of these registry values is that when they are increased, they consume more kernel memory. Seeing as (the lack of) kernel memory is often a bottleneck in scaling up in Terminal Server environments, you should be very careful in adjusting/creating the registry settings we discussed. If you are not careful, you could end up having more performance problems than you started out with. You need to know why.

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