32Bit Eclipse, 32Bit JRockit, 64Bit Windows OS - Maximum Heap Space.

Hi:
My 32Bit Eclipse application tends to run out of heap space on big files. I have been using Sun JRE 6. JVM.
Using the Sun JRE 6 JVM the maximum heap size I can achieve is 1.3GB
My machine has 8GB of physical memory.
I'm wondering if there is any advantage in moving to JRockit.
1. Willl the 32Bit JRocket JVM enable me to have more heap space on 64Bit Windows XP.
2. If (1) is possible what are some aggressive settings I can use to maxmiise heap space.
Thanks
Mark

We run 2.75 GB ( -jrockit -Xms2816m -Xmx2816m ) in production all the time with 32-bit JRockit on Windows 2003 Server 64-bit. I had hoped to get it to 3.25 GB, but we occasionally run out of native memory and have to back down the heap size to 2.75 GB. I look into it when I get more time. Remember to set your min and max memory equal.
The max your process can consume is 4GB (max addressable memory with 32-bits), so your JVM memory + Heap memory can't go over 4GB. If you use JRockit Mission Control, you can connect to the JVM and monitor the size of your virtual address space (looking at Mem Usage in Windows Task Manager kind of works too). I'd start with these JVM args:
+(all args should be on one line)+
-jrockit -Xms2816m -Xmx2816m
-Xmanagement:ssl=false,authenticate=false,port=7091
Connect to it with the jrmc.exe program in your JRockit bin directory and you can get a pretty good idea what is happening in the JVM. Also, if you haven't already, download the latest JRockit (google: JRockit download).
Hope that gets you started so you can check out JRockit...
-Bill S.
(a fan of JRockit)

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Hi Kenneth,
It is not necessarily for posting if you feel this write-up is too detailed. First I want to let you know that I am a novice just trying to help MYSELF, JAVA and others with the same or similar problem. This is going to be a very long post, just like one you (kbrussel) posted about this problem. I realize it may be unnecessary but maybe HARDWARE could be the problem so I listed all my hardware. More Data is better than LESS data I feel!
Background: I have the identical problems on 2 different Gateway Models over almost a year.
System # 01 is an Older Gateway Computer 838GM (Media Center) Pentium 4 - 630 HT Processor 3.0 GHz/2MB Cache, 1.536 GB of RAM (1.49GB Recognized) PC3200 with 800 MHz FSB and 200 GB Hard Drive running Windows XP Media Center 2002 SP2 with all latest updates (Actually I was told it is XP Professional plus additional programs for media) and a GMA900 on-board Video outputting to a Gateway EV700 CTR Monitor using a Linksys Cable Modem Model: BEFCMU10 Version 4.0 and Comcast Broadband ISP for Internet Connection.
System # 02 is a Newer Gateway Computer GM5457E (Media Center) Core 2 Duo Processor E6320 1.86 GHz per CPU Core @ 1066 MHz FSB/4MB Cache, 4.096 GB of RAM (3.405216GB Available to Windows) PC5400 with Intel 945G Chip Set, a SATA II 500 GB Hard Drive running Windows Vista Home Premium V 6.0 (Build 6000) and an NVIDIA GE Force 7500LE Video Card outputting DVI to a new Acer AL2223W HDLCD 22" Monitor using a Linksys Cable Modem Model: BEFCMU10 Version 4.0 and Comcast Broadband ISP for Internet Connection.
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TIA.

Thank you for your replies.
Having resolved this using the 1.5 instead of 1.4 connection another issue came up, which the thread at http://forums.bea.com/thread.jspa?threadID=600016837 helped me resolve. I found the port required by using netstat on the production machine. I am now able to use the console in Mission Control. However I am still not able to connect using MemLeak or start a JRA recording the followin stacktrace is from trying to start memleakdetector via MissionControl in Eclipse.
Thanks in advance for any hints to this problem.
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java.lang.reflect.UndeclaredThrowableException: null
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         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
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         at java.lang.Thread.run(Thread.java:619)
         at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
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         at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
         at com.sun.jmx.remote.internal.PRef.invoke(Unknown Source)
         at javax.management.remote.rmi.RMIConnectionImpl_Stub.invoke(Unknown Source)
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         at com.jrockit.console.rjmx.RJMXConnection.invokeOperation(RJMXConnection.java:432)
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radioactivepal wrote:
So, I should back up Windows 7 while in Windows or should I do that with Boot Camp? I'm a bit confused about the process in general.
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''duplicate of https://support.mozilla.com/en-US/questions/905881''
Hey, I'm doing some cross browser testing and i want to know Is there any difference between the behavior of Firefox in an operating system 64bit & operating system with 32bit. (like windows7/windows vista...)

Hi Kossa,
You can also check if the issue occurs in
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J
Please Note: The third-party product discussed here is manufactured by a company that is independent of Microsoft. We make no warranty, implied or otherwise,
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Regards,
Linda

Hey, I'm doing some cross browser testing and i want to know Is there any difference between the behavior of Firefox in an operating system 64bit & operating system with 32bit. (like windows7/windows vista...) Thanks,

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http://support.microsoft.com/mats/cd_dvd_drive_problems
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32Bit Eclipse, 32Bit JRockit, 64Bit Windows OS - Maximum Heap Space.

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