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From Арсений Зинченко <setev...@gmail.com>
Subject Re: JAVA_OPTS vs CATALINA_OPTS
Date Tue, 28 Jan 2014 14:56:08 GMT
Thanks for your replay, Neven.
Eventually - I decided to heed advices and remove JAVA_OPTS at all. So -
now using only CATALINA_OPTS in /bin/setenv.bat.


2014/1/28 Neven Cvetkovic <neven.cvetkovic@gmail.com>

> On Tue, Jan 28, 2014 at 4:00 AM, Арсений Зинченко <setevoy4@gmail.com
> >wrote:
> >
> >  About point 4 - this is main goal: as we have few Java-applications
> > running
> > in this very system - they must use "global" memory options, thats why I
> > suggested set System variable JAVA_OPTS. But namely Tomcat - must use
> > another memory perametrs.
> >
>
> Arsenije,
>
> That's one way of doing it, yes.  My personal preference is to keep
> system-wide settings empty, and then size each Java process separately (in
> their corresponding startup script). Having said that, it really depends on
> type of applications you are running on you system. Are they same type of
> applications, or are they significantly different? If different, I probably
> want to size them differently, and customize each one of them. Yes, it is
> easy to set default values in the JAVA_OPTS globally, but that's rarely
> what I want for my applications.
>
> Also, others pointed out - it is confusing to see both JAVA_OPTS and
> CATALINA_OPTS both setting up -Xmx and -Xms values. Ultimately, everything
> boils down to a single line:
>
> java.exe %JAVA_OPTS% %CATALINA_OPTS% ...
> java.exe -Xmx1G -Xms512M -Xmx4G -Xms2G ...
>
> Yes, the later will override former parameter, but I wouldn't count on it
> :)
>
> Think if you need to add another Java process that requires 4G, how would
> you set the size of memory of that process?
>
> So, unless all Java applications on that box (you said you had only few) -
> are of similar type and require same sizing, I wouldn't use JAVA_OPTS
> system-wide setting.
>
>
> >
> > So, if I correctly understood - for me better solution will be:
> >
> > 1) set CATALINA_OPTS with Xmx4G etc - in /bin/setenv.bat;
> > 2) set JAVA_OPTS with Xmx1G etc - as system variable.
> >
> > Yep?
> >
>
> It is TOMCAT_HOME/bin/setenv.bat (wherever you installed Tomcat).
>
> Yes, that is one possible solution, if all your Java apps need to be sized
> the same.
>
> I prefer sizing each Java application separately in a script that starts
> it.
>
> Hope that helps!
> n.
>

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