How to use 4GB RAM on Windows 2000 using java

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Anurag Doshi - 24 Oct 2003 20:15 GMT

Hi,

We use a third party application that parses weblogs and generates
statistics.

The application gives OutOfMemory exception when the weblogs are hugs.

I am wondering if doing "editbin.exe /LARGEADDRESSAWARE java.exe" is
going to help.

I have tried all combinations of -Xms, -Xmx, NewSize, MaxNewSize

I have 4GB of physical RAM and I have /3GB in boot.ini in Windows 2000
Advanced Server.

Thanks,
Anurag.

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Roedy Green - 24 Oct 2003 20:37 GMT

>We use a third party application that parses weblogs and generates
>statistics.

Would it be possible as a kludge to break up the logs and let the
third party stuff see only a chunk at a time?

--
Canadian Mind Products, Roedy Green.
Coaching, problem solving, economical contract programming.
See http://mindprod.com/jgloss/jgloss.html for The Java Glossary.

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Anurag Doshi - 27 Oct 2003 18:51 GMT

Even if I could, some day I am going to reach the limit.

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Glen Herrmannsfeldt - 28 Oct 2003 07:42 GMT

> Hi,
>
[quoted text clipped - 10 lines]
> I have 4GB of physical RAM and I have /3GB in boot.ini in Windows 2000
> Advanced Server.

Do you want a JVM that does PAE, or something similar?

I would think it should be possible to parse weblogs without reading the
whole thing into memory first.

-- glen

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Bill Scott - 28 Oct 2003 16:08 GMT

I think you'll have to take the other folks advice (splitting the work
somehow) because there seems to be a ~1.5 Gig memory limit on Win2K

http://java.sun.com/docs/hotspot/PerformanceFAQ.html#22

-Bill

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Anurag Doshi - 28 Oct 2003 18:39 GMT

Exactly, I want a JVM which does PAE or something similar.

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Glen Herrmannsfeldt - 30 Oct 2003 08:01 GMT

> Exactly, I want a JVM which does PAE or something similar.

There is a lot of overhead to PAE, and a fair amount of work to be able to
use it.

-- glen

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How to use 4GB RAM on Windows 2000 using java

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