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From Jon Eaves <...@eaves.org>
Subject Re: java -server option
Date Fri, 11 Apr 2003 01:29:40 GMT
Hi Chris (and others)

Be wary however, I've seen the use of the -server option cause
unexplained crashes with the VM.

This was with JDK 1.4 (IIRC), with Tomcat and with Weblogic.

So, as usual, caveat implementor.

Cheers,
	-- jon

Halstead, Chris wrote:
>> Hi all,
>> 
>> Thanks for the feedback.  We restart our tomcat server each night - allows 
>> us a system maintenance window and database backups etc...  I guess the 
>> notes I've read have talked about improvements in performance in long 
>> running processes. As our system is restarted each day - but we have a 
>> couple of hundred users - would this constitute a long running process and
>> gain any benefit.  Or is it simply a case of try it and see ?
>> 
>> Cheers - Steve
>> 
> 
> 
> Consider 'long-running' to be anything more than several minutes.  In the
> case of a servlet-based app the HotSpot engine should be able to optimize the
> code quite quickly, say 30-50 requests (I'm making a wild guess).  In any
> case 24 hours is _way_ more than enough to warm up oft-executed sections of
> code.  You may have to benchmark it to really quantify the extent of the
> improvement though - i.e. don't expect miracles or a drastic visible
> difference from setting '-server' ;-)
> 
> -chris
> 
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-- 
Jon Eaves <jon@eaves.org>
http://www.eaves.org/jon


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