Thanks Ameer for your reply. What is the max value we can assign to heap space?
Regards, Subhro Paul -----Original Message----- From: Ameer Mawia [mailto:ameer.ma...@gmail.com] Sent: Sunday, March 29, 2015 3:02 AM To: Tomcat Users List Subject: Re: Tomcat server Performance imporvement required Email sent from outside of PSEG. Use caution before using links/attachments. On Mar 29, 2015 2:53 AM, "Paul, Subhro" <subhro.p...@pseg.com> wrote: > > Dear Team, > > I am an application developer from TCS and working for PSEG ( https://www.pseg.com). > > You might have seen my queries which I forwarded on 12 Feb, 2015 for Tomcat server crashing issue. After that we have added some resources to the servers. Now we have two Tomcat6 servers each one is having 16GB of RAM and 8CUPS. All server are Linux 6.5 64 bit OS. > > As per application architecture we have two Apache Proxy servers and two Tomcat servers. Also we have two loadbalancers, one for Proxy loadbalancing and another for Tomcat loadbalancing. So, when request comes that comes to proxy loadbalncer first then Apache Proxy server -> Tomcat loadbalancer -> Tomcat server. > > Some days back on 19th and 23rd of March another incident occurs when server faced some issues again. This time none of the servers where crashed but for some highly used pages in the site, Apache proxy server started complaining Timeout which is 60 seconds. After googling we thought we could increase the Time out in Proxy but client don't accept that. > > So we need some tuning parameters on Tomcat server for better performance. Below are some of the setting parameters from actual server. Ports are masked. > > > Initializing param: > > JAVA_OPTS="${JAVA_OPTS} -Xms1024M -Xmx1024M" > CATALINA_OPTS="${CATALINA_OPTS} -Xms1024M -Xmx1024M" > > > > Connector Initialization param: > > <Connector port="XXXX" protocol="HTTP/1.1" > connectionTimeout="20000" > server=" " > secure="true" > redirectPort="YYYY" > maxThreads="512"/> > > All other parameters are kept as default. > > > Also we did some load testing on the servers in Test environment and found that if we restart the Tomcat server it works absolutely fine but gradually performance decrease though the garbage collection happening and very little memory captured by "PS Old Gen'. > You almost HIT the point. You have to allocate more heap space..Xmx..to your Tomcat JVM, OR else if you can't afford that, then obviously analyse your application and try reducing the memory footprint. > Is there any other parameters we can add in the servers to increase performance? > > Thanks & Regards, > Subhro Paul > > > > ----------------------------------------- > > The information contained in this e-mail, including any attachment(s), is intended solely for use by the named addressee(s). If you are not the intended recipient, or a person designated as responsible for delivering such messages to the intended recipient, you are not authorized to disclose, copy, distribute or retain this message, in whole or in part, without written authorization from PSEG. This e-mail may contain proprietary, confidential or privileged information. If you have received this message in error, please notify the sender immediately. This notice is included in all e-mail messages leaving PSEG. Thank you for your cooperation. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > Regards, Ameer Mawia ----------------------------------------- The information contained in this e-mail, including any attachment(s), is intended solely for use by the named addressee(s). If you are not the intended recipient, or a person designated as responsible for delivering such messages to the intended recipient, you are not authorized to disclose, copy, distribute or retain this message, in whole or in part, without written authorization from PSEG. This e-mail may contain proprietary, confidential or privileged information. If you have received this message in error, please notify the sender immediately. This notice is included in all e-mail messages leaving PSEG. Thank you for your cooperation. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
