I believe Jrockit JVM have slightly higer startup time than the SUN JVM; but that should not make a lot of difference, especially if JVMs are reused in 0.19.
Which Hadoop version are you using? What Hadoop job are you running? And what performance do you get? Thanks, JQ -----Original Message----- From: Grace Sent: Wednesday, May 06, 2009 1:07 PM To: core-user@hadoop.apache.org Subject: Is there any performance issue with Jrockit JVM for Hadoop Hi all, This is Grace. I am replacing Sun JVM with Jrockit JVM for Hadoop. Also I keep all the same Java options and configuration as Sun JVM. However it is very strange that the performance using Jrockit JVM is poorer than the one using Sun, such as the map stage became slower. Has anyone encountered the similar problem? Could you please give some advise about it? Thanks a lot. Regards, Grace
