Login or Register to Ask a Question and Join Our Community


UNIX for Advanced & Expert Users

Tuning Java on LINUX

 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users Tuning Java on LINUX
Prev   Next
# 1  
Old 06-29-2007
Tuning Java on LINUX
Hi,

Need help in tuning JAVA on LINUX.

From http://www.trutek.com/index.php?id=173 I understand that on Linux operating system with 4GB memory, JVM can be run with maximum memory of 3800m. But I had no luck. Could someone help me in achieving on Red Hat Linux server.

Here is the details of my Linux server.

OS: Red Hat Linux (Linux xyzsrvr 2.6.9-5.ELsmp #1 SMP Wed Jan 5 19:30:39 EST 2005 i686 i686 i386 GNU/Linux)
Java: java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Server VM (build 1.5.0_06-b05, mixed mode)
RAM: 4GB

I get this below error while instructing JVM to use 3800m.
$ java -Xmn3800m -Xmx3800m xxxxx (Lots of more options)
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

It would be great if someone help me on this.

Thank you,
Crabbie
 
Login or Register to Ask a Question

Previous Thread | Next Thread

7 More Discussions You Might Find Interesting

1. Linux

Linux through Java code

Hi How can I write a Java program to execute Linux commands? What is the best approach: Invoking the Linux shell within Java and executing commands or, using the Java APIs to do the stuff. Since it is platform independent, it'll know itself what to do. We need not check which OS the Java... (1 Reply)
Discussion started by: Dorothy
1 Replies

2. Programming

Running a Java program on Linux

Hello, I have a project directory in /home/researcher I have in my project/src three packages:A (contains the main class), B and C and I have 2 jar-files file1.jar file2.jar files in the project/my-jars In Class A I import other classes from the other packages I compiled as follows:... (4 Replies)
Discussion started by: chercheur857
4 Replies

3. Android

Android is Linux (and Java)

In case you did not know, Android 2.1, Éclair, runs on the 2.6.29 Linux kernel. However, the user space it is built atop Dalvik, a Google-designed custom JVM (Java virtual machine). This is pretty interesting, when you think about it. The core of Android is the linux kernel, and the standard... (5 Replies)
Discussion started by: Neo
5 Replies

4. Red Hat

Suggested books / Whitepapers for Linux Performance Tuning

Hi All, I'm looking for good reference books or white papers about Linux Redhat Performance tuning / system tuning. Thanks for any advice. (0 Replies)
Discussion started by: linuxqwer
0 Replies

5. Web Development

MySQL Tuning Tools with mysqltuner.pl and tuning-primer.sh

We have been tuning MySQL lately and I ran accoss two useful tools that you might be interested in: mysqltuner.pl tuning-primer.sh Both of these scripts are quite useful for MySQL tuning. Here is some sample output of mysqltuner.pl >> MySQLTuner 0.9.8 - Major Hayden... (3 Replies)
Discussion started by: Neo
3 Replies

6. UNIX for Dummies Questions & Answers

Linux Programming in JAvA

is it advisible to do Linux Programming in JAVA.. If so, whats the advantage over C++ or C.. Cud anyone also help me out by providing some links in this regard.. Would be highly appreciated.. (1 Reply)
Discussion started by: srikumar_cs
1 Replies

7. UNIX for Dummies Questions & Answers

Java in Linux

DOes any1 know if the java.awt and javax.swing packages are installed in Redhat Linux 9.0 or not??. I have compiled a simple Java program and ran it but the Java programs related to GUI are not working. Can any1 provide some Help?. (4 Replies)
Discussion started by: rahulrathod
4 Replies
Login or Register to Ask a Question

LEARN ABOUT OSX

jvisualvm

jvisualvm(1)						      General Commands Manual						      jvisualvm(1)

NAME

       jvisualvm - Java Virtual Machine Monitoring, Troubleshooting, and Profiling Tool

SYNOPSIS

	       jvisualvm [ options ]

PARAMETERS

       Options,  if used, should follow immediately after the command name. Options may be in any order. For a discussion of parameters that apply
       to a specific option, see OPTIONS below.

DESCRIPTION

       Java VisualVM is an intuitive graphical user interface that provides detailed information about Java  technology-based  applications  (Java
       applications)  while  they are running on a given Java Virtual Machine (JVM(*)). The name Java VisualVM comes from the fact that Java Visu-
       alVM provides information about the JVM software visually.

       Java VisualVM combines several monitoring, troubleshooting, and profiling utilities into a single tool. For example, most of the  function-
       ality offered by the standalone tools jmap, jinfo, jstat and jstack have been integrated into Java VisualVM. Other functionalities, such as
       some of those offered by the JConsole tool, can be added as optional plug-ins.

OPTIONS

       The following option is possible when you launch Java VisualVM.

	     -J<jvm_option>
		Pass this <jvm_option> to the JVM software.

USAGE

       Java VisualVM is useful to Java application developers to troubleshoot applications and to monitor and improve  the  applications'  perfor-
       mance.  Java VisualVM can allow developers to generate and analyse heap dumps, track down memory leaks, perform and monitor garbage collec-
       tion, and perform lightweight memory and CPU profiling. Plug-ins also exist that expand the functionality of Java  VisualVM.  For  example,
       most of the functionality of the JConsole tool is available via the MBeans Tab and JConsole Plug-in Wrapper plug-ins. You can choose from a
       catalog of standard Java VisualVM plug-ins by selecting 'Tools' | 'Plugins' in the Java VisualVM menus.

       Start Java VisualVM with the following command:

       %  jvisualvm <options>

SEE ALSO

       For more details about Java VisualVM see the following pages.

	  o Java VisualVM developers' site @
	    https://visualvm.dev.java.net

	  o Java VisualVM in Java SE platform documentation @
	    http://java.sun.com/javase/6/docs/technotes/guides/visualvm/index.html

       (* The terms "Java Virtual Machine" and "JVM" mean a Virtual Machine for the Java platform.)

								    26 Mar 2008 						      jvisualvm(1)