Does different Java processes spawn different JVMs running on a server ?

Hi,
I have 2 applications running on AIX server, one is weblogic server and the other one is inhouse developed Java application. I have set the heap sizes for both the applications and when I do
ps ax | grep JavaI get
/usr/java14/bin/java -Xms2048m -Xmx2048m (weblogic)
/usr/java14/jre/bin/java -Xmx320m -Dvert.log.prefix (inhouse Java)I was wondering if these two processes have their own JVM or as they are running on the same server they share the same JVM. I read in some Java related article that even though there are multiple Java processes, they share the same JVM when run on a single server.
So from the above Java processes is it true that the total Java heap size is 2048+320=2368M and is used by only one JVM?
I appreciate if anyone who can answer or direct me to some resources which might give me some answers.
Thanks,
kraziabtu

No, you have two totally independent JVM's. As with many O/S's AIX (and I'm so sorry for you on that :) will only load a single copy of things like read only data segments, shared libraries and some other things but the processes are separate.
Your first process is allowed to grow to a maximum of 2GB and your second one is set at 320 MB. Again, as there are two of them they are not related.
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<pre>
import java.util.Properties;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.util.Enumeration;
import java.util.NoSuchElementException;
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private String iArgs[];
public static void main(String args[])
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int i = 0;
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* <p>
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s = s.substring(0, s.length() - 1);
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int count = 0;
int currpos = currentPosition;
while(currpos < maxPosition)
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while(!retTokens &&
(currpos < maxPosition) &&
(delimiters.indexOf(str.charAt(currpos)) >= 0))
currpos++;
if(currpos >= maxPosition)
break;
int start = currpos;
boolean inQuotation = false;
while((currpos < maxPosition) &&
(delimiters.indexOf(str.charAt(currpos)) < 0 || inQuotation))
if(str.charAt(currpos) == '"')
inQuotation = !inQuotation;
currpos++;
if(retTokens && (start == currpos) &&
(delimiters.indexOf(str.charAt(currpos)) >= 0))
currpos++;
count++;
return count;
</pre>
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Best Regards, sangita

hmmm .....are you sure that a non-priviledges user
can run a crontab on LINUX. I know that this is true
on SUN UNIX but what i have been told is that you CAN
NOT run a crontab as a non-proviledged user on
LINUX.
Iam not that familiar with LINUX administrationIt's configurable. The admins can allow/deny cron rights to individuals or to everybody.
Try typing crontab -l or crontab -e and see what happens.
If you're not allowed, I don't know if the crontab command itself would fail, or if you just won't be allowed to create entries, so crontab -l not giving an error might not necessarily mean you have permission (though I think that it does).
You can use crontab -e to create entries. Put an entry in for yourself that touches a file 2 minutes from now, and see if it works.

Run java as a different process name in Linux

I have multiple java applications running on a linux platform. When I look at the process list, they all say java. I want them to have a unique process name. The closest I have gotten is starting the java app in a script, and that script name shows up as well as the java app. This could be all fine and dandy, but if someone kills the script, the java process continues on. It would be nice if I could say run this process as this name in Linux, but I know of no such thing. I asked this on LinuxQuestions.org and got a response to use Launch4J...which creates executables for Windows...so that wasn't very helpful. I was hoping the Java community might have a little more insight.

rename the java binaryOr instead of renaming, you could do a symlink... I
don't have a machine to test on, but I think creating
a symlink to the java executable and running that
symlink would change the executable's name in the
process table.nah, the process would still be called 'java'

Does different Java processes spawn different JVMs running on a server ?

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