ZebraTester Blog

Everything Web Performance


Advanced Input File Techniques

One of the most underused techniques when it comes to scripting with ZebraTester is how you make use of your test data to enhance your input files and vice versa. Instead of just collecting the most necessary data for your test you should think of what further data can enhance your test; if you need […] Continue reading

Extending ZebraTester with Plug-ins

ZebraTester ships with a diverse range of built-in functions intended to cover the most common use cases. ZebraTester is also highly expandable, capitalizing on the power and flexibility of the ZebraTester plug-in architecture. In this article, we will demonstrate how to write a ZebraTester plug-in to handle dynamically changing data. Case study: Suppose we have […] Continue reading

How to verify and filter out invalid user accounts?

    When performing load tests by simulating users that have to fill out a HTML login form the user accounts and their passwords are normally extracted from an input file and assigned to the HTML form parameters in such a way that each simulated user uses an own username and password. However, such an […] Continue reading

Tune your Windows 2008 System

If you operate Proxy Sniffer on a Windows Server 2008 we strongly recommend that you tune the maximal number of network connections by performing the following two tasks: Start regedit.exe and create the following new entry *: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters\ TcpTimedWaitDelay = 30 (decimal, dword) Enter the following command from a command prompt: netsh int ipv4 set […] Continue reading

Tune your Mac OS X System.

Tune your Mac OS X System. The default OS-settings for the maximum number of network connections per process is restricted to a value of 256 on almost all Mac OS X versions. You can verify this value by entering the command “ulimit -n” from a terminal. This value is too small to execute load tests […] Continue reading