Top 10 Favorite Performance Counters in Web Site Load Testing Using VSTS 2008
2011-08-22 17:02
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Web Site Related Performance Counters
Web site related performance counters are the counters that provide valuable information about the health of web site that is under test. These parameters are categorized as Requests, Pages, Tests and Errors.1. Request - Avg Req/Sec
Desired value range: HighThis is the average number of requests per second, which includes failed and passed requests, but not cached requests, because they are not issued on web server. Please note that, all http requests, such as image, java-script, aspx, html files generates separate/individual/single request .
2. Request - Avg Req Passed/Sec
Desired value range: HighWhile “Request - Avg Req/Sec” provides an average with respect to all passed and failed request, “Request - Avg Req Passed/Sec” provided the average of passed requests. This info also helps to determine the average number of failed requests/sec.
3. Page - Avg Page Time (Sec)
Desired value range: LowWhile a single request refers to request to a single http elements (such as css, java-script files, images, aspx, html etc), a page is the container of all of the corresponding requests generated when a web page is requested (for instance via the browser address bar). “Page - Avg Page Time (Sec)” counter refers to the average of total time taken to load a page with all of its http elements.
4. Test - Total Test
Desired value range: HighFor instance, we have created a web test, that contains two web pages, pushing on a button on the first page will re-direct the user to the second page, although there will be multiple entries will be involved for Requests and Pages counters, but the whole process will be considered as a single Test.
This counter considers the total number of tests (which includes passed and failed tests) during the test period.
5. Scenario - User Load
Desired value range: HighThis counter considers the maximum user load that has been provided during the test run. Please note that, for Step Load pattern, where more user volume is added on step by step basis, the maximum user load will be counted through this counter parameter.
6. Errors - Errors/Sec
Desired value range: LowIncludes average number of errors occurred per second, which includes all types of errors.
Hardware Related Performance Counters
7. Processor - % Processor Time
Desired value range: LowThis is the number of processor time being utilized in percentage.
8. Memory - Available MBytes
Desired value range: HighThis the amount of Memory available in Mega byte.
9. Physical Disk - Current Disk Queue Length
Desired value range: LowIt shows how many read or write requests are waiting to execute to the disk. For a single disk, it should idle at 2-3 or lower.
10. Network Interface - Output Queue Length
Desired value range: LowThis is the number of packets in queue waiting to be sent. A bottleneck needs to be resolved if there is a sustained average of more than two packets in a queue.
Download the SQL Script which selects all of the parameters as mentioned above with respect
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