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I am using Pentaho 4.8 and this is the configuration in my start-pentaho.sh

export CATALINA_OPTS="-Xms256m -Xmx1024m -XX:MaxPermSize=256m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"

Can anybody please explain what these parameters mean ???

-Xms256m 
-Xmx1024m 
-XX:MaxPermSize=256m

I did not find any particular reason, why my server on my Linux machine is responding very slow. I thought may be increasing the size here might help , but I don't want to change until I understand the parameters, if anybody have any suggestion for increasing my server speed, then please help me

Kent Pawar
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Hussain Akhtar Wahid 'Ghouri'
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  • If your service is slow, I suggest you performance profile it, or at least monitoring your application with VisualVM. You can try increasing the maximum memory size, but I suspect this will make little difference. – Peter Lawrey Dec 19 '12 at 14:14
  • ...Ideally this should be migrated to superuser.com – Kent Pawar Dec 19 '12 at 14:15
  • @KentPawar : how can i migrate it , or i have to create a new question there ?? – Hussain Akhtar Wahid 'Ghouri' Dec 19 '12 at 14:19
  • @HussainAkhtarWahid Well a user on this site with a high reputation can migrate it.. Such questions would be better suited for superuser as it is not a programming question and may get negative votes on this site.. – Kent Pawar Dec 19 '12 at 14:49

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