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Performance Counters in the .NET Framework

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@2017-03-06 11:13:33

This topic provides a list of performance counters you can find in the Performance Monitor.

Often times, it is not trivial to define a comprehensive set of performance counters upfront. Continuous investigation and improvement are the way to go. It is a good idea to leave these counters on after development is finished, because your application will not live in a vacuum; there are tons of things which may impact performance, and thus your custom counters will do a great job for maintenance and on-going monitoring.

The nicest thing about performance counters is that they enable you to easily monitor your own application-specific and business-centric counters against the built in counters, such as those that relate to GC, Exceptions, Threading, etc, and they give you all this rich information with only a minimal impact on your application.
@2017-03-07 14:25:17

Exception performance counters

The Performance console .NET CLR Exceptions category includes counters that provide information about the exceptions thrown by an application. The following table describes these performance counters.

Performance counter Description
# of Exceps Thrown Displays the total number of exceptions thrown since the application started. This includes both .NET exceptions and unmanaged exceptions that are converted into .NET exceptions. For example, an HRESULT returned from unmanaged code is converted to an exception in managed code.

This counter includes both handled and unhandled exceptions. Exceptions that are rethrown are counted again.
# of Exceps Thrown / Sec Displays the number of exceptions thrown per second. This includes both .NET exceptions and unmanaged exceptions that are converted into .NET exceptions. For example, an HRESULT returned from unmanaged code is converted to an exception in managed code.

This counter includes both handled and unhandled exceptions. It is not an average over time; it displays the difference between the values observed in the last two samples divided by the duration of the sample interval. This counter is an indicator of potential performance problems if a large (>100s) number of exceptions are thrown.
# of Filters / Sec Displays the number of .NET exception filters executed per second. An exception filter evaluates regardless of whether an exception is handled.

This counter is not an average over time; it displays the difference between the values observed in the last two samples divided by the duration of the sample interval.
# of Finallys / Sec Displays the number of finally blocks executed per second. A finally block is guaranteed to be executed regardless of how the try block was exited. Only the finally blocks executed for an exception are counted; finally blocks on normal code paths are not counted by this counter.

This counter is not an average over time; it displays the difference between the values observed in the last two samples divided by the duration of the sample interval.
Throw to Catch Depth / Sec Displays the number of stack frames traversed, from the frame that threw the exception to the frame that handled the exception, per second. This counter resets to zero when an exception handler is entered, so nested exceptions show the handler-to-handler stack depth.

This counter is not an average over time; it displays the difference between the values observed in the last two samples divided by the duration of the sample interval.
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