Load Test Statistics

Load Tester collects an extensive measurements during a load test. This data is collected in samples. Each sample has multiple measurements associated with it. Depending on the measurement type, some measurements may not ba applicable during each sample and may therefore appear empty in some displays, such as the Statistics View. Unless otherwise noted, the value of each measurement in a sample pertains only to events that completed

 

While the term sample is used for our data storage units, it is important to understand that Load Tester does not rely on sampled

Test statistics

Test statistics are collected by the Virtual Users as the testcases are executed. The data is collected at four levels: Test Summary, Testcase, Web Page and Transaction. These levels represent narrowing scopes of data - for example: web pages may contain many transactions and a testcase may contain many web pages. In many cases, the higher levels are not simply aggregations of lower levels but measurements tailored specifically for each level.

 

Average Duration

 

Average Page Duration

 

Average Page Wait Time

 

Average Speed - The average data transfer rate of the item. For testcases, this measurement includes the total bytes transferred for all web pages and transactions and the total duration of the testcase, including think time but not repeat delay. For web pages, this includes the bytes transferred for all transactions and the total duration of the page, not including think time. For transactions, this includes bytes sent and received (the total of the size of the HTTP request and response messages) and the duration of the transaction.

 

Average Wait Time

 

Average TTFB - The average TTFB for the transaction. The Time To First Byte

 

Bytes/sec

 

Current Page Users - The number of users working on a web page at the end of the sample period. Note that working on a web page refers to the process of requesting and receiving the contents of a URL. Users that are not working on pages will either be executing think time or the repeat delay.

 

Errors

 

Hits/sec - The number of transactions completed per second. "Transactions/sec" would be more technically accurate but is not used for two reasons: (1) hits/sec is a standard industry term and (2) the term transaction

 

Maximum Duration

 

Maximum Page Duration

 

Maximum TTFB

 

Minimum Duration

 

Minimum Page Duration

 

Minimum TTFB

 

Pages/sec

 

Repeats

 

Time

 

Total Size

 

Users

 

Load Engine statistics

Load Engine statistics are collected by the load engines in the process of monitoring its own performance.

 

Time

 

CPU %

 

Memory % - The amount of VM memory that is available. Note that the load testing and/or the load engine, by default, is configured, by default, to use 200M of RAM. There may be more memory available. If so, see the Configuring Memory Usage page for configuration instructions.

 

Users - The number of VUs running in this load engine.

 

Total Capacity - The estimated

 

Engine Status

Server statistics

Server statistics are collected by the Server Agents to help assess the performance of the server OS and application servers during a load test.

Operating System

CPU %

 

Memory %

 

Context Switches / sec

 

Process Queue Length

 

Page reads/sec

 

Page writes/sec

 

Disk I/O Time %

 

Avg Disk Service Time

 

Disk Queue Length

 

Disk Reads/sec

 

Disk Writes/sec

 

Network bytes sent

 

Network bytes received

 

Network packets received / sec

 

Network packets sent / sec

 

Network Packets Received Errors

 

Network Packets Sent Errors

 

Network Collisions

 

TCP Connections Established

 

TCP Connection Failures

 

TCP Segments Retransmitted / sec

ASP.NET (Active Server Pages)

ASP.NET Active Sessions

 

ASP.NET Application Restarts

 

ASP.NET Cache Entries

 

ASP.NET Cache Hit Ratio

 

ASP.NET Cache Hits

 

ASP.NET Cache Misses

 

ASP.NET Cache Turnover Rate

 

ASP.NET Compilations

 

ASP.NET Current Requests

 

ASP.NET Disconnected Requests

 

ASP.NET Errors/sec

 

ASP.NET Last Request Execution Time

 

ASP.NET Pipeline Instance count

 

ASP.NET Queued Requests

 

ASP.NET Rejected Requests

 

ASP.NET Request Wait Time

 

ASP.NET Requests Executing

 

ASP.NET Requests Not Found

 

ASP.NET Requests Not Authorized

 

ASP.NET Requests Queue Length

 

ASP.NET Requests Succeeded

 

ASP.NET Requests Timed Out

 

ASP.NET Requests/sec

 

ASP.NET Sessions Timed Out

 

ASP.NET Sessions Abandoned

 

ASP.NET Unhandled Execution Errors/sec

.NET CLR (Common Language Runtime)

.NET CLR Class loader Heap Size

 

.NET CLR Current AppDomains

 

.NET CLR Current Assemblies

 

.NET CLR Exceptions / sec

 

.NET CLR Heap Size

 

.NET CLR Generation 0 Collections

 

.NET CLR Generation 1 Collections - The number of times the generation 1 objects are garbage collected. Higher generation GCs include all lower generation GCs.

 

.NET CLR Generation 2 Collections

 

.NET CLR Lock Contention Queue Length

 

.NET CLR Lock Contention / sec

 

.NET CLR Lock Contentions

 

.NET CLR Logical Thread Count

 

.NET CLR Percent Time in GC

 

.NET CLR Physical Thread Count

 

.NET CLR Recognized Thread Count

IIS (Internet Information Server)

IIS CGI Requests/sec

 

IIS Connection Attempts/sec

 

IIS Current Connections

 

IIS File Cache Entries

 

IIS File Cache Hits

 

IIS File Cache Hit %

 

IIS File Cache Misses

 

IIS ISAPI Extension Requests/sec

 

IIS Kernel URI Cache Entries

 

IIS Kernel URI Cache Hits

 

IIS Kernel URI Cache Hit %

 

IIS Kernel URI Cache Misses

 

IIS Requests/sec

 

IIS URI Cache Entries

 

IIS URI Cache Hits

 

IIS URI Cache Hit %

 

IIS URI Cache Misses

IIS+App

These statistics represent the combined processes for IIS (inetinfo), ASP.NET (aspnet_wp) and the Application Pool Process (w3wp).

 

IIS+App Handle Count

 

IIS+App Private Bytes

 

IIS+App Thread Count

 

IIS+App Virtual Bytes

 

IIS+App % Processor Time

 

http://www.webperformanceinc.com/support/suite/manual/Load_Test_Statistics.htm