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From "Daniel Blumenthal" <dan...@wordchamp.com>
Subject RE: Java heap space
Date Sat, 07 Oct 2006 18:56:10 GMT
The problem has only occurred twice, so I can't reliably reproduce it.  It's
more that I wonder if I should bump the number up to -Xmx2048m.  Is there a
reason to choose 256m?  What is the default?  The maximum?


> -----Original Message-----
> From: Martin Gainty [mailto:mgainty@hotmail.com] 
> Sent: Saturday, October 07, 2006 2:48 PM
> To: Tomcat Users List; daniel@wordchamp.com
> Subject: Re: Java heap space
> 
> Dan
> What happens when you increase your JVM max memory parameter 
> (say to 256MB) with -Xmx256m in your 
> %java_home%\jre\lib\jvm.cfg restart tomcat?
> Martin --
> 
> This e-mail communication and any attachments may contain 
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> ----- Original Message -----
> From: "Daniel Blumenthal" <daniel@wordchamp.com>
> To: "'Tomcat Users List'" <users@tomcat.apache.org>
> Sent: Saturday, October 07, 2006 12:21 PM
> Subject: RE: Java heap space
> 
> 
> > The quick answer is no - all of the code is non-reentrant, 
> and there 
> > aren't many places for a memory leak to hide from the garbage 
> > collector, but saying that there isn't a leak is like 
> saying your code 
> > is bug free.  The one area that is suspect is the database 
> code - I'm 
> > fairly careful, but every once in a while I find a 
> PreparedStatement or ResultSet that isn't closed...
> > 
> > Still, these are two different tracks.  I'd like to get Java set up 
> > correctly to give maximum memory to Tomcat, while simultaneously 
> > trying to track down any leaks.
> > 
> > Daniel
> > 
> > 
> >> -----Original Message-----
> >> From: Santosh Puranshettiwar [mailto:santosh@wirkle.com]
> >> Sent: Saturday, October 07, 2006 6:00 AM
> >> To: Tomcat Users List
> >> Subject: Re: Java heap space
> >> 
> >> Are you sure there isn't any memory leak? I mean it  might happen 
> >> that you are increasing the heap size just to delay the 
> >> OutOfMemoryErrors.
> >> 
> >> Santosh.
> >> 
> >> Daniel Blumenthal wrote:
> >> > I've been running a struts app on a plain vanilla 
> install of Tomcat 
> >> > (5.0.28), and recently I've been getting some 
> OutOfMemoryErrors.  I 
> >> > did some looking, and found the -Xms and -Xmx flags, and
> >> was hoping to
> >> > get some advice regarding good values.
> >> >
> >> > I'm upgrading to a couple of RH Linux servers which will only be 
> >> > running apache and tomcat (the database will be on other
> >> machines).  
> >> > Each server has 4GB of memory.  What would reasonable
> >> values be to get
> >> > the best performance out of Tomcat?
> >> >
> >> > Thanks!
> >> >
> >> >
> >> >
> >> >
> >> > 
> >> 
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> >> >
> >> >
> >> >   
> >> 
> >> 
> >> 
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> >> 
> >> 
> > 
> > 
> > 
> > 
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> > 
> >



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