Tomcat http keep-alives
Can someone briefly explain what these are? I've searched online and found that they can hold connections open and possibly allow users to make several simultaneous requests, but nothing definitive.
The issue is a web-site that seems to stall after a moderate amount of use (100 - 200 concurrent users). The setup is Windows Server running IIS making requests to Tomcat. Eventually the site starts giving white screens -- no error messages in the browser and none in the tomcat logs. Looking in the IIS logs I find the vague 503 error, which I'm starting to think could be originating in Tomcat.
I'm not doing any extra Tomcat settings (as far as maxThreads, minThreads, maxKeepAlives...) so I'm looking for ideas and if they could possibly be the culprit of my problem. I'd like to configure them but only if I can get a solid idea of what I should use.
Also, in searching the Tomcat docs I've found that by default maxThreads is set to 200 and I'm curious would that translate to 1 thread per user accessing the site or could one user possibly be using several threads at once? Would the keepalives setting impact this?
thanks guys!!
