performance on Tomcat 4.0.6

[Jose Santiago Oyervides Gonzalez]

Hi, 
I'm doing some tests on performance with TC 4.0.6.   My system (W2k IIS5.0 -
JSDK 1.4.0). I'm expecting my site will have a heavy load (about 20,000
concurrent connections between several servers) My pages wont have database
connections.

I've read some documents about it, and I wonder if someone could tell me
what's the limit of the parameters minProcessors, maxProcessors and
acceptCount, when I configure minProcessors above 1000, Tomcat stops after
about 30 seconds. �?
Does it really improves performance?


Another question: How can I increase the the memory configuration of JVM.
I've read that is donde with the Xms, xms,ms and mx options, but how can I
tell Tomcat to use that configuration. (i'm using Tomcat as a service) I've
tried using it with no luck.

Would that work if I edit cataliba.bat and add those options in %JAVA_OPTS%.

Does anyone have some good tips about performance? (besides the documents
found in the FAQ section)


Regards.
Jose Oyervides.


Up to now this is my server.xml file :


<Server port="8005" shutdown="SHUTDOWN" debug="0">

  <Service name="Tomcat-Standalone">

    <Connector className="org.apache.catalina.connector.http.HttpConnector"
               port="8080" minProcessors="750" maxProcessors="1000"
               enableLookups="false" 
               acceptCount="400" debug="0" connectionTimeout="60000"/>

    <Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
               port="8009" minProcessors="1000" maxProcessors="2000"
               acceptCount="400" debug="0"/>

    <Engine name="Standalone" defaultHost="localhost" debug="0">

          <Logger className="org.apache.catalina.logger.FileLogger"
              prefix="catalina_log." suffix=".log"
              timestamp="true"/>

      <Realm className="org.apache.catalina.realm.MemoryRealm" />

      <Host name="localhost" debug="0" appBase="\\OtherMachine\foo\"
unpackWARs="true">

          <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs"  prefix="localhost_access_log."
suffix=".log"
                 pattern="combined"/>

         <Context path="/testing" docBase="testing"
         debug="0" privileged="true"/>

        <Context path="/examples" docBase="examples" debug="0"
                 reloadable="false" crossContext="true">

        <Context path="/manager" docBase="manager" 
         debug="0" privileged="true"/>

          <Parameter name="context.param.name" value="context.param.value"
                     override="false"/>
        
          <Manager className="org.apache.catalina.session.PersistentManager"
              debug="0"
              saveOnRestart="false"
              maxActiveSessions="-1"
              minIdleSwap="-1"
              maxIdleSwap="-1"
              maxIdleBackup="-1">
                <Store className="org.apache.catalina.session.FileStore"/>
          </Manager>
                 
        </Context>

      </Host>

    </Engine>

  </Service>
 
  <Service name="Tomcat-Apache">

    <Connector className="org.apache.catalina.connector.warp.WarpConnector"
     port="8008" minProcessors="5" maxProcessors="75"
     enableLookups="true" appBase="webapps"
     acceptCount="10" debug="0"/>

    <Engine className="org.apache.catalina.connector.warp.WarpEngine"
     name="Apache" debug="0">

      <Logger className="org.apache.catalina.logger.FileLogger"
              prefix="apache_log." suffix=".log"
              timestamp="true"/>

      <Realm className="org.apache.catalina.realm.MemoryRealm" />

    </Engine>

  </Service>

</Server>

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