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From "Bates, Jonathan" <Jonathan.Ba...@bskyb.com>
Subject Saturation stress testing httpd problems
Date Thu, 21 Sep 2000 14:57:42 GMT
Hi All,

I don't know if this is the correct forum for this problem - if not please
let me know of another.

Here goes..

We have an infrastructure that uses Apache (latest version) running on a
server farm of solaris boxes to support (eventually) up to 10 million
concurrent users (apache is used as a gateway server via our specialist
module).

I've written a test program that stresses the server by continuously sending
a number of concurrent requests to Apache (currently configured to run 200
or so httpd's).

When the concurrency exceeds the 200 configured httpds, Apache gets swamped
and falls over. - This I don't mind too much, but after getting swamped it
falls over and doesn't recover - which is a big problem. 

It seems to leave thousands of opened sockets on port 80 with TIME_WAIT
status - which can be seen via 'netstat -a'.

The problem doesn't lie in our specialist gateway module as it also happens
in raw Apache.

Has anyone else encountered this problem, if so do you know of any
solutions?

Many Thanks
Jon Bates
WAPTV Project
BSkyB Television Ltd.
UK.


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