Configuring PoolTcpConnectors for many concurrent requests

[Wesley Gamble <w....@pentasafe.com>]

All,

I am running Tomcat 3.2.3.

I have modified my server.xml file to specify some of the sizing 
parameters on my PoolTcpConnectors, (both the Tomcat listen port and the 
AJP12 port, used for integration with Web servers) like so:

<Connector className="org.apache.tomcat.service.PoolTcpConnector">
<Parameter name="handler" 
value="org.apache.tomcat.service.http.HttpConnectionHandler"/>
<Parameter name="port" value="8080"/>
<Parameter name="backlog" value="100"/>
<Parameter name="thread_pool" value="on"/>
<Parameter name="max_threads" value="500"/>
<Parameter name="max_spare_threads" value="50"/>
<Parameter name="min_spare_threads" value="25" />
</Connector>

I believe this setup would in theory, allow me to have up to 500 
concurrent requests on the port specified by the "port" attribute.

I have two questions:

1) Is there any significant performance degradation I would see by 
having this set so high in an installation where this level of 
concurrency may never be reached?  That is, can I just set these 
attributes as a "just in case it's a big installation" and not be 
concerned that they are too high when the level of concurrency is low?

2) Am I correct in understanding that this only affects listener threads 
and does not affect actual worker threads dispatched to handle these 
requests?  Is there pooling for the worker threads and how is it managed?

Thanks for any help,
Wes Gamble


--
To unsubscribe:   <ma...@jakarta.apache.org>
For additional commands: <ma...@jakarta.apache.org>
Troubles with the list: <ma...@jakarta.apache.org>