How to view the current linux system allocated to the JVM how much memory

Help using the linux command
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to WAS an example:   
  
[tmp] $ ps-ef | grep java   
root 9787 1 0 Sep17? ; 00:02:48 / opt / IBM / WebSphere / AppServer / java / bin / java   -Xms50m-Xmx256m   
  
-Xms and-Xmx JVM represent the minimum memory allocation and maximum memory .   
  
stack information you can use kill -3 followed by the java process pid, so that we can generate a thread dump .   What if the system simultaneously tomcat, jobss, weblogic java these similar containers, calculate the memory allocated to java also need a one summed it ? This and the configuration file directly into memory allocation did not see much difference , I wonder if there is no better method, or the landlord 's teacher wants answers.
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/ / So, if the system simultaneously tomcat, jobss, weblogic java these similar containers, calculate the memory allocated to java also need a one summed it ?
Yes

/ / this and the configuration file directly into memory allocation did not see much difference, I wonder if there is no better way
no
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help themselves top
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Bangding weblogic or jboss only know how to look at this type of container JVM memory allocation size . Landlord can describe specific problems.
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this you should go ask java plate oh
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this is our first asked me to write a script that real-time monitoring of the JVM stack information that is just the most basic question : linux system virtual machine is allocated for the JVM how much memory
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use scripting ah ? We first asked me to write a script to monitor the JVM memory stack internships and other information
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this is our first asked me to write a script that real-time monitoring of the JVM stack that is just the most basic information question : linux system virtual machine is allocated for the JVM how much memory   can not help you understand this a
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to WAS an example:

[tmp] $ ps-ef | grep java
root 9787 1 0 Sep17? ; 00:02:48 / opt / IBM / WebSphere / AppServer / java / bin / java -Xms50m-Xmx256m

-Xms and-Xmx JVM represent the minimum memory allocation and maximum memory .

stack information you can use kill -3 followed by the java process pid, so that we can generate a thread dump .
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landlord finally how to solve this problem it seek share answers