Prashant Chandra

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since Jun 28, 2007
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Recent posts by Prashant Chandra

Hi All,

Ours is retail domain Point Of Sale application. With normally not more than 5 concurrent users accessing application at a time through out the year. We have our application designed using IceFaces 1.8.2 (Open Source) and below are the other environment details.

ICEFaces : 1.8.2 (Open Source)
JSF : 1.2_13
container : tomcat 6.0.20
OS : Linux Red Hat 4.1.2-46
java version "1.6.0_17" HotSpot
database : Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
startup params :
/usr/java/default/bin/java -Djava.util.logging.config.file=/opt/xx-xxx-web/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms512m -Xmx4096m -XX:PermSize=512m -XX:MaxPermSize=2048m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=8001 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -verbose:gc -Xloggc:/var/log/xx-xxx-web/gc.log -XX:+PrintGC -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:HeapDumpPath=/opt/xx-xxx-web/temp -XX:+HeapDumpOnOutOfMemoryError -Djava.library.path=/usr/lib64 -Dorg.apache.catalina.connector.RECYCLE_FACADES=true -Djava.endorsed.dirs=/opt/xx-xxx-web/endorsed -classpath :/opt/xx-xxx-web/bin/bootstrap.jar -Dcatalina.base=/opt/xx-xxx-web -Dcatalina.home=/opt/xx-xxx-web -Djava.io.tmpdir=/opt/xx-xxx-web/temp org.apache.catalina.startup.Bootstrap start

Problem:
Due to Christmas festival the number of requests have increased 10 times. suddenly the server heap memory utilisation has jumped all time high to 100%(then Full GC happens every 2 minutes which takes 7 seconds, all the users faces slow responses during that time), Perm Gen memory utilisation is never above 512 mb. we have increased number of application servers but still even increasing application servers(from 6 to 10 ) has not solved our problem.
We are planning to migrate to IceFaces EE version. but it is going to take time of 2 months. Please suggest me if we can do any quick fix to avoid this problem.

12 years ago
[Edit: thread hijack removed. Please ask your own questions in a new post]
[ June 03, 2008: Message edited by: Bear Bibeault ]
15 years ago
JSP
Can you suggest good book to prepare for exam?