[users@httpd] ThreadPerChild in winnt mdm question

[Ali Ozgun <al...@nextengine.com>]

-----Original Message-----
From: Ali Ozgun [mailto:ali@nextengine.com] 
Sent: Thursday, November 20, 2003 3:33 PM
To: 'users-help@httpd.apache.org'
Subject: ThreadPerChild in winnt mdm question


hi,
I have two questions to ask.

1. We are running Apache 2.0.43 as a proxy to Tomcat/JBoss at the backend.
All services reside on a 
Win2000 machine. The problem we are having is we get "connection refused"
responses from apache  for around 60% of the requests if we hit it with,
say, 100, simultaneous requests where the TPC is set to 200. Each request
actually goes through Apache to JBoss/Tomcat and a servlet just makes these
wait for 40-60 seconds, simulating a long process.

We actually had this problem with our application and wanted to verify if it
occurs with this simple test. If we put an interval of around 100-200 ms
between requests then everything is fine.

Any ideas why we get the connection refused errors? and how to prevent it?

2. If you decrease the # of concurrent requests this problem goes away. But
then another weird thing becomes clear: It looks like, no matter what value
you set the ListenBacklog to, it is only 5. It is very consistent, say, if
you send 13 requests with a TPC = 5, The first 5 goes through, the 2nd 5
waits and rest 3 gets connection refused. Any ideas where I can change this
ListenBackLog thing. In OS or something? Or is the problem ListenBacklog?

thanks a lot for reading,
ali.


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