Hi Nathan
Some installations run with the despatcher (the data queue isolating the CGI stuff from the Apache thread) and some do not. In this case they do not - the programs are all running in the thread. They are going to switch to use the despatcher this month to see if it improves matters.
The odd thing is that it will behave for a week or so and then suddenly start to issue thread failure messages to the QSYSOPR message queue. Sometimes that just stops and other times it escalates until the server just crashes completely and has to be restarted. I am sorry I haven't got the job log messages to hand, but they are occurring in the bowels of the Apache software somewhere. It all sounds like some sort of memory leak issue, but we haven't isolated one in the application yet. IBM were not much help either.
"1-2 thousand CGI server jobs". Wow! No, nothing of that magnitude. They have max out at just over a 1000 concurrent sessions during the day - about 3-400 call centre agents I guess, each with an average of 2 sessions (some more). Those sessions are usually served by a 100 or so CGI threads - could be more but certainly not a 1-2 thousand. That is an enormous number - are they running persistent CGI?
Cheers
Kevin
-----Original Message-----
From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Nathan Andelin
Sent: 06 January 2011 23:15
To: Web Enabling the AS400 / iSeries
Subject: Re: [WEB400] Summing up the Icebreak discussion
It supports over 1000 concurrent sessions and most of the time is fine.
Occasionally, however, it crashes.
The HTTP server crashes? I seem to recall Renaissance using data queues to
communicate between CGI jobs and DB server jobs. Have you isolated the failure
to the HTTP server? We have a client that runs 1-2 thousand CGI server jobs. Is
that the kind of scope you're talking about?
-Nathan.
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