Toomas Aas wrote:
Hello!I run Apache 2.2.11 with prefork MPM on FreeBSD 6.4. This is a pretty standard installation done from FreeBSD ports. It has a behaviour that makes me curious.Say, I open a browser and enter request for http://mysite.com/LargeTextFile.txtThe file begins to load in the browser window.While the file is loading, I open another browser tab and enter the same request there. The file in second tab doesn't begin to load until it has completed loading in the first tab.So - if the same client requests the same resource from the server multiple times, the requests are not handled in parallel, but sequentially.If the same client requests different resources, the requests are handled in parallel, i.e. I can load LargeTextFile.txt and LargeTextFile2.txt simultaneously.There is no problem with available child processes, if I look the output of server-status I see multiple idle child processes waiting for requests.The reason why I'm investigating this is that we have a web app written in JavaScript/PHP which sends multiple concurrent requests from browser to server, and developers are worried that this kind of behaviour slows down the application. I've been told that this kind of behaviour isn't observed on other servers but only on this particular server set up by me. The only other web server I currently have access to is Apache 2.2.13 running on FreeBSD 7.2 (also set up by me) and it seems to behave the same. So maybe the problem is me ;)In addition to simply loading .txt files I've also tried with .php scripts, and the results are identical. So I guess the problem is not specific to a handler but is more generic.What do I have to do to achieve the wanted behaviour (concurrent handling of identical requests from the same client)?
Are you absolutely sure that it is not just a behaviour from the browser ?For example, if you open two separate command windows, and start in each a "wget" for the same file (or curl, or lwp-request), do you observe the same behaviour ?
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