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ASP.NET Site Performance Secrets by Matt Perdeck

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Thread locking

If you use locking to ensure only a single thread can access a given resource, some threads may have to wait for a lock to become available.

To see if this is an issue, use perfmon to check the following counters, all in category .NET CLR LocksAndThreads (to see how to do this, refer to the Pinpointing bottlenecks section, the Thread usage subsection in chapter 2):

Category: .NET CLR LocksAndThreads

 

Contention Rate/sec

The rate at which the runtime tries to get a managed lock, and fails to do so.

Current Queue Length

Last recorded number of threads waiting to get a managed lock.

If you consistently have threads failing to get a managed lock, you are looking at a source of delays. You can consider the following ways to reduce ...

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