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'.
Is there any other parameters we can add in the servers to increase performance?
Thanks & Regards,
Subhro Paul
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