On Wed, 2010-10-06 at 12:22 +0200, Sergey wrote: > When running application on Windows XP 32 bit machine the search time is 0.5 > second. JVM is IBM Java 5 for 32 bit. > But when running the same application on much more powerfull Windows Server > 2007 64 bit machine the search time is 3 seconds. JVM is IBM Java 5 for 64 > bit.
If your memory allocation (-Xmx) is the same, the 64 bit machine will have less available heap due to the 64 bit pointers. This could result in excessive garbage collection. Try increasing the memory allocation for the 64 bit machine with 50% or more. Besides that, there should be no significant difference and you're left with profiling. I recommend Process Explorer http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx for general system and single process load inspection. I/O is often the sinner, så check read and write calls. Switching to the Java part, try using visualvm https://visualvm.dev.java.net/ with the Visual GC-plugin to see where the time is spend. - Toke Eskildsen --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
