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To: dev@cocoon.apache.org
From: Jorg Heymans <jh@domek.be>
Subject: Re: JVM memory settings for production Cocoon?
Date: Mon, 26 Jan 2004 14:02:02 +0100
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Hi Arje,

How do the amount of available memory and the JDK memory settings (eg 
Xms512M -Xmx512M) relate? Having 512MB in my server, what's the maximum 
i can/should set these parameter so i'm not starving the other processes 
of memory?

Any real-life thoughts? (I'll start googling this anyway)
Jorg

Arje Cahn wrote:
> By the way, i've set up
> http://wiki.cocoondev.org/Wiki.jsp?page=CocoonPerformance
> to scribble down some performance tricks. Please add your findings!
> 
> Arj�
> 
> 
>>-----Original Message-----
>>From: Arje Cahn 
>>Posted At: Monday, January 26, 2004 1:26 PM
>>Posted To: Cocoon Dev List
>>Conversation: JVM memory settings for production Cocoon?
>>Subject: RE: JVM memory settings for production Cocoon?
>>
>>
>>Hi,
>>
>>We have Xms & Xmx both on 512mb for about 3 or 4 medium 
>>websites (about 10 to 20.000 pages in total).
>>Make sure you set the "maxobjects" of the transient-store to 
>>a high number if you've got lots of memory available. It's 
>>set to 100 by default which is *way* too low. I use about 4 
>>to 8000. Seems to work. Check the status page to use if it's 
>>not overloading.
>>
>>Also, set the store-janitor's heapsize in cocoon.xconf higher 
>>(by default it's set to use only 64 mb). Set the use-store 
>>attribute of the XSLT processor you're using to true to cache 
>>your XSLT's (is this still set to false by default 
>>http://archives.real-time.com/pipermail/cocoon-devel/2003-Octo
>>ber/022203.html?). Turn off subsitemap reloading (only for 
>>deployment!).
>>
>>Oh, use XSLTC.
>>
>>Hope this helps!
>>
>>Arj�
>>
>>
>>
>>>-----Original Message-----
>>>From: Rottmann, Lars [mailto:Lars.Rottmann@vodafone.com]
>>>Posted At: Monday, January 26, 2004 11:44 AM
>>>Posted To: Cocoon Dev List
>>>Conversation: JVM memory settings for production Cocoon?
>>>Subject: AW: JVM memory settings for production Cocoon?
>>>
>>>
>>>
>>>We currently use the following options (on a 4GB machine):
>>>
>>>JAVA_OPTIONS_GENERAL="-server -Djava.awt.headless=true \
>>>-Xms2536M -Xmx2536M -XX:+UseParallelGC \
>>>-XX:+UseAdaptiveSizePolicy -DisableExplicitGC "
>>>
>>>Lars
>>>
>>>
>>>
>>>
>>>>On 23.01.2004 17:06, Andrzej Jan Taramina wrote:
>>>>
>>>>
>>>>>Currently have -Xms set to 256MB and -Xmx set to 512MB, but that 
>>>>>sounds low
>>>>>to me.  
>>>>
>>>>Not that I'm very experienced with such settings, but I 
>>
>>"heard" that 
>>
>>>>setting Xms and Xmx to the same value is recommendable and it was 
>>>>standard in the company I worked for. 256 MB is indeed not 
>>>
>>>much, but 512 
>>>
>>>>should be enough for normal Cocoon pipeline processing. 
>>
>>Using FOP or 
>>
>>>>Batik is more memory consuming.
>>>>
>>>>Joerg
>>>
>>>
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>>
>