what is java_opt parameter?

[legolas <le...@gmail.com>]

Hi
Thank you for reading my post.
Can some one please tell me what is java_opts and how does it works?
is it some jvm_options?

Thanks
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Re: what is java_opt parameter?

[Johnny Kewl <jo...@kewlstuff.co.za>]

Hi... I'm often wrong...

The one is a command line option the other is an environment variable.

ie tomcat5 ++JvmOptions="blah blah"
On windows those params will get stuck in the registry.... which immediately 
asks the question what happens on linux.... I dont know, but it makes me 
think that JvmOptions has a lot to do with a windows service.

Inside a Java program one can get at parameters with
java.util.Properties properties = System.getProperties();

And these can be set in a number of ways...

Either from another program... in code ie setProperty(blah blah)
or
java -Dfile.encoding=utf-8 -jar MyProgram.jar    ie on the command line
or
set (export) JAVA_OPTS=-Dname1=value1 -Dname2=value2 ... ie from environment 
variables for tomcat.

If given a choice, I would use JAVA_OPTS... its Java, and definitely ports 
to linux.
For example type
java -X
it will give you all the options for setting memory in jre
All those parameters can be set in JAVA_OPTS but I'm not sure if they make 
sense on the command line with JvmOptions and even then I think all that 
happens is the service program reads it from the windows registry and sets 
JAVA_OPTS.

Maybe that helps.... Maybe Turk can give us more info... I think he wrote 
the windows service module...

Regards







----- Original Message ----- 
From: "legolas" <le...@gmail.com>
To: <us...@tomcat.apache.org>
Sent: Saturday, April 07, 2007 4:59 PM
Subject: what is java_opt parameter?


>
> Hi
> Thank you for reading my post.
> Can some one please tell me what is java_opts and how does it works?
> is it some jvm_options?
>
> Thanks
> -- 
> View this message in context: 
> http://www.nabble.com/what-is-java_opt-parameter--tf3541017.html#a9884745
> Sent from the Tomcat - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
> 


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