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From "Martin Gainty" <mgai...@hotmail.com>
Subject Re: out of memory error
Date Wed, 19 Jul 2006 16:58:05 GMT
Good Afternoon Jon-

set Max Mem and Min Mem within jvm.cfg (-Xmx and -Xms options) to the same value 
http://java.sun.com/docs/hotspot/PerformanceFAQ.html#8

Exercise caution on playing with stack SS
64k is mightly lean
512k(default for Sparc) and 256k(default for Intel) usually is plenty unless your program
has some grossly huge stack allocations

Drivers-
Also be mindful of synch points for Type 2 (OCI) drivers vs using Type 4 (thin) drivers..

HTH
Martin --
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----- Original Message ----- 
From: "Jon Wingfield" <jon.wingfield@mkodo.com>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Wednesday, July 19, 2006 12:12 PM
Subject: Re: out of memory error


> This may be of help (emphasis on may):
> 
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4765019
> 
> Has a bit about tuning Xss for a high number of threads.
> 
> MW Janssen wrote:
>> Hi, 
>> 
>> These are my parameters:
>> 
>> I have Xmx1024m and Xms1024m as well for the heap size memory. I dont set
>> Xss so I presume I use the default value.
>> My Operating System:
>> 
>> OS Name: Windows 2003 OS Version: 5.2 Total RAM: 2.00Gb Free RAM: 2.00Gb
>> Committed JVM memory: 1.02Gb Total swap: 4.00Gb Free swap: 3.87Gb (from
>> lambdaprobe)
>> 
>> Maarten
>> 
>> -----Oorspronkelijk bericht-----
>> Van: David Tonhofer [mailto:d.tonhofer@m-plify.com] 
>> Verzonden: woensdag 19 juli 2006 16:57
>> Aan: Tomcat Users List
>> Onderwerp: Re: out of memory error
>> 
>> 
>> MW Janssen wrote:
>> 
>> "java.lang.OutOfMemoryError: unable to create new native thread"
>> 
>> 
>> Are you it isn't just the heap and/or stack that's too small? Try starting
>> the Jvm with one of the extended options line "-Xss500k" "-Xmx100m" (if it
>> is the Sun
>> JVM)
>> 
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> 
> 
> 
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