Tomcat Performance Tunning

In order to handle scalability, webserver needs to be controlled by certain configuration.

In this post we wil take Tomcat as a web server and go through ceratin configurations so that It handle heavey requests.

• Increase JVM heap memory

  JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8
  -server -Xms1024m -Xmx1024m
  -XX:NewSize=512m -XX:MaxNewSize=512m -XX:PermSize=512m
  -XX:MaxPermSize=512m -XX:+DisableExplicitGC"

• Resolve JRE memory leaks Tomcat server.xml contains

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

   />

• Thread pool setting

  <Connector port="8080" address="localhost"
  maxThreads="250" maxHttpHeaderSize="8192"
  emptySessionPath="true" protocol="HTTP/1.1"
  enableLookups="false" redirectPort="8181" acceptCount="100"
  connectionTimeout="20000" disableUploadTimeout="true" />

   If the number of threads reaches much higher say more than 750 its better to 

  go for clustering. 

  Higher is the max threads more will be the application start up time.

• Compression    : server.xml configuration

  <Connector port="8080" protocol="HTTP/1.1"
  connectionTimeout="20000"
  redirectPort="8181" compression="500"
  compressableMimeType="text/html,text/xml,text/plain,application/octet-stream" />

• Database performance tuning : Twiking maxIdle, maxActive, and maxWait...
• Tomcat Native Library
• Go for stateless application
• Database connection pooling configuration :Set the max active connection,  connection waiting time out , Idle connection properly.