![]() To use Typeperf, open a command window and then type or paste in the following command: typeperf "\Processor(_Total)\% Processor Time" It does not have a UI like Perfmon but it can be easily run from an automation script, is efficient to use, and results can be viewed in the cmd window or in Excel. Typeperf is a tool to view performance counters quickly and illustrates the example above well. To run it, type “taskmgr” from a command prompt or from the Run prompt (Window + R), or hitting Ctrl + Shift + Esc will bring it up. Task Manager will allow you to do some rudimentary performance monitoring but does not allow you to record it or see much history. Or specifically as: \Processor(_Total)\% Processor Time These three examples can be represented in the format of: \Object(instance)\Counter Then, for the Processor _Total we have a counter named “% Processor Time”, for PhysicalDisk _Total we have a counter named “Disk writes/sec”, and for Processes notepad we have “private bytes”. For the Processor object, the first processor instance on your system would be processor0 or all of them combined are “_Total”, for the PhysicalDisk the first instance would be disk0 or all of them combined are “_Total”, and for Processes an instance could be “notepad”, or “”. For example the Processor is an object, PhysicalDisk is an object, and Processes are an object. Understanding Performance Monitoring General Conceptsįrom Perfmon’s perspective, everything in the windows operating system is viewed as an object, then an instance, then a counter. Determining the delta between the two could direct you to focus in on existing or potential issues. For example, run version 1.0 of your process for several hours tracking and saving everything with Perfmon, then compare that with the same duration and usage with version 1.1. You want to take a before and after performance profile snapshot.You may not have an issue that you are investigating, but looking at the general behavior may give insight into how your application runs. You want to know the general behavior of the system or a specific process.Disk IO: Perfmon can track physical disk reads, writes, etc.CPU usage: If a process seems CPU bound, Perfmon will point this out immediately. ![]() If the developer knows the rate of the leak, it helps them determine which objects might be leaking by matching the leak rate with the object size. Examples are bytes per second, minute, or hour. Memory leak in a process: You want to verify it and find the rate of it.You have detected high resource usage and you want to verify and track it.Here are three reasons why QA staff should become familiar with using Windows Performance Monitor: Typeperf is also easy to use and I cover its usage as well in this document. Out of the many tools that can allow you to do this, Perfmon is the easiest to use and most popular. Microsoft Performance Monitor (Perfmon) will allow you to track system and process resource usage. You can also access this performance data through code inside your application, written in script or compiled languages, such as C or C#. There are many different built-in tools that will allow you to view this performance data such as Taskgr.exe, Perfmon.exe, or Typeperf.exe. Performance monitoring is built into the Windows operating system and every metric available is being constantly monitored, whether you choose to view it or not.
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