How to set the Heap size for JAVA

I am facing the memory out of space problem:
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
Could anyone suggest me a solution to solve the problem ?
increase the heap size ?
anyway to increase the heap size in the program by default without additional setup?
Thank you.

How to determine the program must handled with increase heap size ?
could I know any method to know whether the program is memory leaking or need large memory heap size?

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How to set the heap size of JVM

please let me know that how to set the heap size of JVM

C:\>java -X
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    -Xint             interpreted mode execution only
    -Xbootclasspath:<directories and zip/jar files separated by ;>
                      set search path for bootstrap classes and resources
    -Xbootclasspath/a:<directories and zip/jar files separated by ;>
                      append to end of bootstrap class path
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                      prepend in front of bootstrap class path
    -Xnoclassgc       disable class garbage collection
    -Xincgc           enable incremental garbage collection
    -Xbatch           disable background compilation
    -Xms<size>        set initial Java heap size
    -Xmx<size>        set maximum Java heap size
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    -Xprof            output cpu profiling data
    -Xrunhprof[:help]|[:<option>=<value>, ...]
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    -Xdebug           enable remote debugging
    -Xfuture          enable strictest checks, anticipating future default
    -Xrs              reduce use of OS signals by Java/VM (see documentation)look at the -Xm? lines
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- Marcus

How to set the heap size in adminstrative console

Hi All,
Please let me know how to increase heap size in weblogic Adminstrative console.
Regards
Madhu

The answer to this depends on whether you're trying to set the heap size for a manager server which is managed by NodeManager, or the admin server.
First click on "Lock and Edit".
If the former, go into "Environment"->"Servers", then click on the server you want to configure. This should start you on the "Configuration"->"General" tab. Now click on the "Server Start" tab. Find the "Arguments" field. Assuming this is blank, put something like the following in the field value:
-Xmx1536m
Then click "Save", then "Activate Changes". When you restart the managed server the next time, it should use those new settings.
If, however, you're trying to set this on the admin server, you can't do this in the admin console at all. In that case, go into $DOMAIN_HOME/bin and edit the "setDomainEnv.{sh,cmd}" script (".sh" if on Unix/Linux, ".cmd" on Windows). Find the line that sets the "MEM_ARGS" variable, like the following on Windows:
set MEM_ARGS=-Xms256m -Xmx512m
Change this line to whatever you want, then restart the admin server.

How to set the stack size for alchemy application?

Anybody know how to set the stack size for alchemy application?
If you know, please tell me how to adjust the stack size for alchemy application?

Hi,
The stack size is set as public const gstackSize in the alchemy generated code. You can see this if you build with ACHACKS_TMPS set. The default is one megabyte.
One way to change the stack size is to use llvm-dis to disassemble avm2-libc/lib/avm2-libc.l.bc, generating avm2-libc.l.ll, modify the constant, and then use llvm-as to recompile your modified library and overwrite the old one. These utilities should be in your path if alchemy is set up.

How to set the fetch size for a ResultSet object?

Connection con = getConnection();
Statement stmt = con.createConnection();
ResultSet res = stmt.executeQuery("select * from table");
//res.setFetchSize(?);
while (res.next)
res.get....
}I do not know the number of rows .
How can I set the fetch size for the ResultSet object?
I try
res.last();
res.setFetchSize(res.getRow()/2);
res.beforeFirst();
while (res.next)
res.get....
}but it's so slow if there are 6000 rows.
How can I set the fetch size for the ResultSet object more effectible?
And what is the best number to set the fetch size?

The fetch size defaults to a standard number. It is unlikely that it will be any faster if you set it unless you only plan to read a small number of rows.
i.e. if you are going to read all the rows, you need to read all the rows no matter what.
Unless the system has set the fetch size to 1 changing it will not be faster.
Depending on the row length, reading in 6000 rows is going to take a long time. You could try using a cpu profiler to improve performance.
Do you really need to read everything in every row?

How to set the paper size for scan import

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Is there a way to set new default heap size for Java?

Hi,
I have a problem with setting global heap size for installed version of Java. By global I mean that every program that will be run using that version of Java, will be using that amount of memory. for heap. I know that I can use Xmx and Xms for each program that I start, but I don't want to do this. I just want to set some kind of property for installed version of Java.

Launch Firefox and set the web page as wide as you want by dragging the hash marks at the lower right corner. Center the page on your screen where you want it. Then quit Firefox. launch Firefox again. The page should be just where on the screen and sized as you set it prior to quitting.

Upto how much I can set maximum Heap size for jvm?

I am running application on 8GB RAM Windows 64 bits machine.
I am running out of OutOfMemory (Heap Space). I want to increase the Heap Size for my jvm.
But can anybody please tell me what is the limit by which I can set the maximum size for heap?
Thanks in Advance,
Jenish

Max allowed memory per process is 2 raised to the 64th power. What maximum memory you can set depends on the memory available
for your application. You may be able to set more than 8GB ram then it will use the swap space and it will slow down your application
performance. So try different memory size and see which one works best for your application.

How to increase the heap size of the container in whioch BPEL is running ?

Hi All,
I recently raised an SR they have asked me to do the following,
Can you please try and start the container running the BPEL process with max
heap space (-Xmx) of 2 GB and the eden space (-Xmn) at about 60% of 1228m and
the option -XX:+AggressiveHeap set. (even though this option is recommended for
multi processor machines say 4)
can anyone kindly explain me how to increase the Heap size and Eden size of BPEL container ?
Thank You

Hi Deepak I cant see any attribute or element in the oc4j_opmn.xml file regarding heap memory. In the server properties I changed the size of heap memeory how can I rollback.
I am getting the following error
Configuration information
Running in C:\product\10.1.3.1\OracleAS_1
Operation mode:Startup, App Server, No Enterprise Manager, Single Instance
Oracle home:C:\product\10.1.3.1\OracleAS_1
Oracle home name:Unnamed
Instance name:SOA.01hw117905.India.TCS.com
Instance type:allProducts
Version:10.1.3.4.0
Uses infrastructure:false
Not an infrastructure instance, no infrastructure information available
Components:[j2ee, apache, orabpel, oraesb, owsm, Wsil]
2009-08-19 09:08:51.863--Begin log output for Mid-tier services (SOA.01hw117905.India.TCS.com)
2009-08-19 09:08:51.863--Processing Step: starting OPMN
2009-08-19 09:09:00.394--Processing Step: starting OPMN managed processes
2009-08-19 09:09:35.19--End log output for Mid-tier services (SOA.01hw117905.India.TCS.com)
An unknown OPMN error has occured
oracle.appserver.startupconsole.model.ConsoleException: An unknown OPMN error has occured
     at oracle.appserver.startupconsole.control.OPMNController.doStart(OPMNController.java:121)
     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.control.GroupController.doStart(GroupController.java:47)
     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.view.controller.ControllerAdapter.start(ControllerAdapter.java:30)
     at oracle.appserver.startupconsole.view.controller.MasterControlAdapter.run(MasterControlAdapter.java:94)
     at oracle.appserver.startupconsole.view.Runner.main(Runner.java:39)
Caused by: oracle.ias.opmn.optic.OpticControlException: Error from opmn during process control operation
     at oracle.ias.opmn.optic.AbstractOpmnEntity.runCommand(AbstractOpmnEntity.java:174)
     at oracle.ias.opmn.optic.AbstractOpmnEntity.start(AbstractOpmnEntity.java:110)
     at oracle.appserver.startupconsole.control.OPMNController.doStart(OPMNController.java:89)
     ... 6 more
Exception caused by
Error from opmn during process control operation
oracle.ias.opmn.optic.OpticControlException: Error from opmn during process control operation
     at oracle.ias.opmn.optic.AbstractOpmnEntity.runCommand(AbstractOpmnEntity.java:174)
     at oracle.ias.opmn.optic.AbstractOpmnEntity.start(AbstractOpmnEntity.java:110)
     at oracle.appserver.startupconsole.control.OPMNController.doStart(OPMNController.java:89)
     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.control.GroupController.doStart(GroupController.java:47)
     at oracle.appserver.startupconsole.control.Controller.start(Controller.java:69)
     at oracle.appserver.startupconsole.view.controller.ControllerAdapter.start(ControllerAdapter.java:30)
     at oracle.appserver.startupconsole.view.controller.MasterControlAdapter.run(MasterControlAdapter.java:94)
     at oracle.appserver.startupconsole.view.Runner.main(Runner.java:39)
<?xml version='1.0' encoding='WINDOWS-1252'?>
<response>
<msg code="-82" text="Remote request with weak authentication.">
</msg>
<opmn id="01hw117905:6200" http-status="206" http-response="2 of 3 processes started.">
<ias-instance id="SOA.01hw117905.India.TCS.com">
<ias-component id="default_group">
<process-type id="home">
<process-set id="default_group">
<process id="172" pid="2176" status="Alive" index="1" log="C:\product\10.1.3.1\OracleAS_1\opmn\logs\\default_group~home~default_group~1.log" operation="request" result="success">
<msg code="0" text="">
</msg>
</process>
</process-set>
</process-type>
<process-type id="oc4j_soa">
<process-set id="default_group">
<process id="173" pid="5556" status="Stopped" index="1" log="C:\product\10.1.3.1\OracleAS_1\opmn\logs\\default_group~oc4j_soa~default_group~1.log" operation="request" result="failure">
<msg code="-21" text="failed to start a managed process after the maximum retry limit">
</msg>
</process>
</process-set>
</process-type>
</ias-component>
<ias-component id="HTTP_Server">
<process-type id="HTTP_Server">
<process-set id="HTTP_Server">
<process id="171" pid="2724" status="Alive" index="1" log="C:\product\10.1.3.1\OracleAS_1\opmn\logs\\HTTP_Server~1.log" operation="request" result="success">
<msg code="0" text="">
</msg>
</process>
</process-set>
</process-type>
</ias-component>
</ias-instance>
</opmn>
</response>

Setting the heap size

Hi all,
I wanted to ask you about setting the heap size value.
How we can calculate the heap size?
I had problems with the max heap size in my application.
So I increased the max value to 2048 MB, but I am afraid that
the same error may come up again some time depending upon the
usage.
So how I can find, say for a server having 2 GB RAM,
how much heap size I should give? I read that there is no defined
formula to calculate this. But I wanted to get the best way of doing it.
Please advise,
Sandeep

As has already been said, you probably have a leak. However, when trying to gauge the maximum heap you can (not should, but can) use you have to take into account what the server is doing, and its operating system. You do not want your JVM to page. So, for a 2GB server, with no other app on it, I think the "usual" is something like 75% max? Though I really wouldn't take my word for it...it's not my field.

Hi, I am using Indesign CS6, How to set the page size in Inches.

Hi, I am using Indesign CS6, How to set the page size in Inches.

All fields in InDesign can be entered in any measurement system. So, if you want to make an 8"x10" document and go to File>New Document and the window looks like this:
…you can type either 8 in or 8" into the Width field like this:
…and when you move to the next field, it will convert the eight inches into the equivalent number in the unit of measure that it is using at the moment, like this:
… (203.2 milimeters is the same as 8 inches). You can also enter a different measurement unit into other fields once the file is created, such as the width or height of a frame, or the position of an object in the X and Y coordinates.
If you would rather just work in inches instead of having to type the inches mark or abbreviation, go to InDesign>Preferences>General and select the Units & Increments tab. There you will see Ruler Units for Horizontal and Vertical at the top of the window. Set them to Inches and all of the fields will display in inches. If you do that to an open document, you will change the unit of measure for that document. If you do it while no documents are open, it will change the unit of measure for any new documents you create. To change the unit of measure for existing documents, you will have to open each and make the change.

How to set the screen size with nested Iview screen

Can someone show me how to set the screen size with nested IView screen.
at the moment i only try it with trial and error untill it looks somewhat close. Is there a property in VC to set the size for Height and width.
The same question is for the form. the form elements inside the form is easy but the actual form is still a challenge.

Hi,
Yes you are correct ,Still the Form and iview are not able to change thier Layout Structure using a Propery.
it is available with VC7.1
Govindu

Sun ONE Studio 4 aka Forte: How to set the output path for classes ?

Help !
Beginner's question:
Sun ONE Studio 4 aka Forte:
How to set the output path for classes ?
As default, the class files are created in the same directory as the
sources.
In opposite, both JBuilder and Together support that there is a tree
with the sources and another tree with the classes.
The first answer I got was "not possible with Forte, but just if you write your own "ANT Build script" !
a) Please point me to a ready-to-use ANT script for this purpose, if such is available
b) Is using ANT instead of the MAKE as comfortable ? Besides the separation of sourcecode and classes, I would like to keep everything else to be the same, i.e. I don�t want to edit the ANT file if I enlarge the project by directories or files.
Tia
Sincerely
Rolf

You can set S1S's options to place newly created .class files in a specific location.
Identify the compiler that is being used - Open the S1S's Tools/Options window, expand Editing and select Java Sources. Note the Default Compiler value. (If it's one if the Ant options, you use Ant to specify this option, not S1S.)
Open the S1S's Tools/Options window, expand Building/Compiler Types and select the appropriate compiler.
The Properties tab of the compiler has the property Target, which sets the filesystem where the compiler output is directed. If you choose <not set>, the .class files are written to their source directory.
When you set the Target, your change affects all classes that use this compiler.
Very few options can't be set in S1S; the challenge is finding out where they're set!

How to set the frame size?

Hi,
Can some one show me how to set the frame size in this program? History: I have created a window and added a button but its to small. So I want to increase the size of the frame to at least 600X400 pixel.
private static void showGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("ButtonDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Create and set up the content pane.
        Main newContentPane = new Main();
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        frame.setContentPane(newContentPane);
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }It would be nice if you could show me how to do it.
Thank you very much for reading this.

Challenger wrote:
Simply adding
frame.setSize(new Dimension(600,400));to the end of your code should work perfectly.Or, if you want to do it correctly, .setPreferredSize() on your frame before you .pack() it. The default layout manager for JFrame is BorderLayout, which uses the preferredSize of each component to calculate sizes during the .pack() call.

How to set the page size

Hi,
How to set the page size of a B tree node in berkeley db java edition?
thanks.

The two systems have different performance characteristics. If you are concerned with the performance characteristics, then the best way to tell is to benchmark them.
By the way, both BDB and BDB JE are B-trees.

How to set the Heap size for JAVA

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