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Date: Thu, 01 Sep 2011 10:40:07 -0400
From: David kerber <dckerber@verizon.net>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: Performance for many small requests
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On 8/31/2011 12:25 PM, Tony Anecito wrote:
> Hi David,
>
> You need to not only look at the container but it's configuration and the jre that is being used. There have been a lot of improvements in all areas for performance. Also, understand the servlet model seems developers have completely forgotten about it and how important it is.
> Also, I always revaluate my design/implementation every 6 months or so and make changes based on lessons learned. Also, do not be afraid to try something new :]

I'm running JRE 6_27, in server mode, on windows server 2008 with 4 
cores, 8GB RAM.  TC 7.0.20, downloaded yesterday.

I'm having some somewhat minor performance issues, not performing quite 
as well as my Win2k machine with TC 5.5.  Could somebody look at my 
server.xml and recommend some tweaks for handling tons of very small 
requests, <150 bytes per request.  The requests are sent with a single 
http post, from ~600 remote sites collecting data every few seconds to 
minutes.

Would one of the thread pools help this situation?


<Server port="8005" shutdown="SHUTDOWN">
   <Listener className="org.apache.catalina.core.AprLifecycleListener" 
SSLEngine="on" />

   <Listener className="org.apache.catalina.core.JasperListener" />

   <Listener 
className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />

   <Listener 
className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

   <Listener 
className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

   <GlobalNamingResources>
     <Resource name="UserDatabase" auth="Container"
               type="org.apache.catalina.UserDatabase"
               description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
               pathname="conf/tomcat-users.xml" />
   </GlobalNamingResources>

   <Service name="Catalina">

     <!--
     <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
         maxThreads="300" minSpareThreads="4"/>
     -->
     <Connector port="1024"
	protocol="HTTP/1.1"
         connectionTimeout="20000"
         redirectPort="8443"
	maxThreads="600"
	acceptCount="100"
	minSpareThreads="10"
	socketBuffer="16384"
	/>

     <!--
     <Connector executor="tomcatThreadPool"
                port="8080" protocol="HTTP/1.1"
                connectionTimeout="10000"
                redirectPort="8443" />
     -->

     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

     <Engine name="Catalina" defaultHost="localhost">


       <Realm className="org.apache.catalina.realm.LockOutRealm">
         <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                resourceName="UserDatabase"/>
       </Realm>

       <Host name="localhost"  appBase="webapps"
             unpackWARs="true" autoDeploy="true">

       </Host>
     </Engine>
   </Service>
</Server>


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