Modifying heap size allocated to glassfish...

Hello!
I've noticed that by default glassfish uses 512Mb for the heap. I'd like to modify this value.
How can I change it?
Is there any way through the administrative consiole provided (asadmin)?
Thank you
Sorin

You can modify the heap size from the admin console.
Login to the admin console, Click on Application Server on the Left Pane.
On the Right Pane, click on JVM Settings -> JVM Options.
Modify -Xmx to whatever value you desire.
Cheers,
Vasanth

Similar Messages

NT Service and Heap size

Can someone tell me if there is a way to :
(1) verify and modify heap size in nt service?
(2) in multi server mode, there are two nt services for weblogic
domains, is it needed to change heap size for weblogicAdmin service for
heap size increase? What will happen if PIA is 1024MB heap size and
weblogicAdmin is 256MB?
Thanks in advance/T

Nicolas, test show that once the nt service is installed, modifying heap
size in setenv.cmd and run setenv.cmd file reinstall nt service does not
change the heap size already in registry. So, test shows that I can
modify the heap size directly in registry and restart service?. Am i doing something wrong here.. can i correct and only to modify and existing heap size in
registry?
Please let me know what else should I do once the old heap
size in already in registry and not the new heap size when reinstalled NT service.
other question, long the weblogic tuning, I found the following from bea site. During the peak time, we may have 40000 unique users per day. Should I also consider increase maxUserPort? The weblogic domains are hosted on windows 2003 servers.
Windows Tuning Parameters
For Windows platforms, the default settings are usually sufficient. However, under sufficiently heavy loads it may be necessary to adjust the MaxUserPort and TcpTimedWaitDelay. These parameters determine the availability of user ports requested by an application.
By default, ephemeral (that is, short-lived) ports are allocated between the values of 1024 and 5000 inclusive using the MaxUserPort parameter. The TcpTimedWaitDelay parameter, which controls the amount of time the OS waits to reclaim a port after an application closes a TCP connection, has a default value of 4 minutes. During a heavy loads, these limits may be exceeded resulting in an address in use: connect exception. If you experience address in use: connect exceptions try setting the MaxUserPort and TcpTimedWaitDelay registry values under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters key:
MaxUserPort = dword:00004e20 (20,000 decimal)
TcpTimedWaitDelay = dword:0000001e (30 decimal)
Increase the value of the MaxUserPort parameter if the exception persists.
For more information about Windows 2000 tuning options, see:
§ The Microsoft Windows 2000 TCP/IP Implementation Details.
§ The Windows 2000 Performance Tuning white paper.
thanks
T

Problem increasing heap size using Java Control Panel

I am running a web-based bioinformatics package which uses a Java applet as the client application. It mostly works fine, but some large clustering processes don't complete, they just cycle endlessly. The user manual advises increasing heap space "by entering the following command in the Java Control Panel or Java Plug-in dialog: -Xms128M -Xmx256M." I can open the Java Control Panel OK and enter the necessary command in the Java Runtime Parameters box, but after clicking OK then Apply, the Runtime Parameters box is empty again and there is no increase in the heap size allocation. In other words, the change doesn't take effect.
I have already tried: adjusting one parameter at a time (max heap size first, then min); changing uppercase to lowercase M (-Xmx256m); restarting the browser after the change; rebooting my PC - none of these has helped.
Technical details: it's Java 6 standard edition, build 1.6.0_10-rc-b28; browser is Internet Explorer 7; operating system is Vista (Service Pack 1); PC is a 2.4 GHz processor with 2 GB RAM (so I have plenty available to allocate to Java). I have local admin privilege on my PC.
Help would be much appreciated, as I really need to complete these cluster analyses. I'm a biologist not a developer, so ideally I need a solution that doesn't involve major programming, though I'm OK with registry edits and use of the command line. Thanks in advance.

The failure to retain the parameters is a bug, per hdong in this [Java,net thread|http://forums.java.net/jive/thread.jspa?threadID=44540&tstart=0] dated August 14
"I did a little more research and found out that the problem is only with "-rc" or "-beta" versions of plugin. When 1.6.0_10 is finally released, the version string will be "1.6.0_10". Plugin works fine to set/get jvm parameters when version string is "1.6.0_10".
I am surprised that this issue was not discovered earlier. It was probably because the internal test binary use "1.6.0_10" as version string.
Yeah, it is a bug that will affect many manny developers. It will be fixed as soon as possible."

Maximum Heap Size in Java 5

When migrating an application from JDK1.4.2_12 to JDK1.5.0_10,it was seen that the max. heap size that was set using -Xmx had to be reduced from 1.5 GB to 1.3 GB on a win32 machine inorder to create JVM successfully. Any pointers to what in Java 5.0 could have brought about this change is highly appreciated.
(Please note that I understand how heap size allocation works w.r.t virtual memory on win32.)

Because the VM foot print got bigger of course.
That has happened with every version of the Sun VM.

How can I know the allocated Heap size at runtime?

I need to know (at runtime) the allocated Heap memory of my application.
How can I do that ??????

The Runtime methods freeMemory() and totalMemory() will give you the currently allocated heap size. The JVM can allocate more memory from the system as it needs it and these numbers will change.
It doesn't look like you can get the actual maximum heap size the system can allocate. See
http://developer.java.sun.com/developer/bugParade/bugs/4175139.html

Massive memory hemorrhage; heap size to go from about 64mb, to 1.3gb usage

**[SOLVED]**
Note: I posted this on stackoverflow as well, but a solution was not found.
Here's the problem:
[1] http://i.stack.imgur.com/sqqtS.png
As you can see, the memory usage balloons out of control! I've had to add arguments to the JVM to increase the heapsize just to avoid out of memory errors while I figure out what's going on. Not good!
##Basic Application Summary (for context)
This application is (eventually) going to be used for basic on screen CV and template matching type things for automation purposes. I want to achieve as high of a frame rate as possible for watching the screen, and handle all of the processing via a series of separate consumer threads.
I quickly found out that the stock Robot class is really terrible speed wise, so I opened up the source, took out all of the duplicated effort and wasted overhead, and rebuilt it as my own class called FastRobot.
##The Class' Code:
    public class FastRobot {
         private Rectangle screenRect;
         private GraphicsDevice screen;
         private final Toolkit toolkit;
         private final Robot elRoboto;
         private final RobotPeer peer;
         private final Point gdloc;
         private final DirectColorModel screenCapCM;
         private final int[] bandmasks;
         public FastRobot() throws HeadlessException, AWTException {
              this.screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
              this.screen = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
              toolkit = Toolkit.getDefaultToolkit();
              elRoboto = new Robot();
              peer = ((ComponentFactory)toolkit).createRobot(elRoboto, screen);
              gdloc = screen.getDefaultConfiguration().getBounds().getLocation();
              this.screenRect.translate(gdloc.x, gdloc.y);
              screenCapCM = new DirectColorModel(24,
                        /* red mask */    0x00FF0000,
                        /* green mask */ 0x0000FF00,
                        /* blue mask */   0x000000FF);
              bandmasks = new int[3];
              bandmasks[0] = screenCapCM.getRedMask();
              bandmasks[1] = screenCapCM.getGreenMask();
              bandmasks[2] = screenCapCM.getBlueMask();
              Toolkit.getDefaultToolkit().sync();
         public void autoResetGraphicsEnv() {
              this.screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
              this.screen = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
         public void manuallySetGraphicsEnv(Rectangle screenRect, GraphicsDevice screen) {
              this.screenRect = screenRect;
              this.screen = screen;
         public BufferedImage createBufferedScreenCapture(int pixels[]) throws HeadlessException, AWTException {
    //          BufferedImage image;
            DataBufferInt buffer;
            WritableRaster raster;
              pixels = peer.getRGBPixels(screenRect);
              buffer = new DataBufferInt(pixels, pixels.length);
              raster = Raster.createPackedRaster(buffer, screenRect.width, screenRect.height, screenRect.width, bandmasks, null);
              return new BufferedImage(screenCapCM, raster, false, null);
         public int[] createArrayScreenCapture() throws HeadlessException, AWTException {
                   return peer.getRGBPixels(screenRect);
         public WritableRaster createRasterScreenCapture(int pixels[]) throws HeadlessException, AWTException {
         //     BufferedImage image;
             DataBufferInt buffer;
             WritableRaster raster;
              pixels = peer.getRGBPixels(screenRect);
              buffer = new DataBufferInt(pixels, pixels.length);
              raster = Raster.createPackedRaster(buffer, screenRect.width, screenRect.height, screenRect.width, bandmasks, null);
         //     SunWritableRaster.makeTrackable(buffer);
              return raster;
    }In essence, all I've changed from the original is moving many of the allocations from function bodies, and set them as attributes of the class so they're not called every time. Doing this actually had a significant affect on frame rate. Even on my severely under powered laptop, it went from ~4 fps with the stock Robot class, to ~30fps with my FastRobot class.
##First Test:
When I started outofmemory errors in my main program, I set up this very simple test to keep an eye on the FastRobot. Note: this is the code which produced the heap profile above.
    public class TestFBot {
         public static void main(String[] args) {
              try {
                   FastRobot fbot = new FastRobot();
                   double startTime = System.currentTimeMillis();
                   for (int i=0; i < 1000; i++)
                        fbot.createArrayScreenCapture();
                   System.out.println("Time taken: " + (System.currentTimeMillis() - startTime)/1000.);
              } catch (AWTException e) {
                   e.printStackTrace();
    }##Examined:
It doesn't do this every time, which is really strange (and frustrating!). In fact, it rarely does it at all with the above code. However, the memory issue becomes easily reproducible if I have multiple for loops back to back.
#Test 2
    public class TestFBot {
         public static void main(String[] args) {
              try {
                   FastRobot fbot = new FastRobot();
                   double startTime = System.currentTimeMillis();
                   for (int i=0; i < 1000; i++)
                        fbot.createArrayScreenCapture();
                   System.out.println("Time taken: " + (System.currentTimeMillis() - startTime)/1000.);
                   startTime = System.currentTimeMillis();
                   for (int i=0; i < 500; i++)
                        fbot.createArrayScreenCapture();
                   System.out.println("Time taken: " + (System.currentTimeMillis() - startTime)/1000.);
                   startTime = System.currentTimeMillis();
                   for (int i=0; i < 200; i++)
                        fbot.createArrayScreenCapture();
                   System.out.println("Time taken: " + (System.currentTimeMillis() - startTime)/1000.);
                   startTime = System.currentTimeMillis();
                   for (int i=0; i < 1500; i++)
                        fbot.createArrayScreenCapture();
                   System.out.println("Time taken: " + (System.currentTimeMillis() - startTime)/1000.);
              } catch (AWTException e) {
                   e.printStackTrace();
    }##Examined
The out of control heap is now reproducible I'd say about 80% of the time. I've looked all though the profiler, and the thing of most note (I think) is that the garbage collector seemingly stops right as the fourth and final loop begins.
The output form the above code gave the following times:
Time taken: 24.282 //Loop1
Time taken: 11.294 //Loop2
Time taken: 7.1 //Loop3
Time taken: 70.739 //Loop4
Now, if you sum the first three loops, it adds up to 42.676, which suspiciously corresponds to the exact time that the garbage collector stops, and the memory spikes.
[2] http://i.stack.imgur.com/fSTOs.png
Now, this is my first rodeo with profiling, not to mention the first time I've ever even thought about garbage collection -- it was always something that just kind of worked magically in the background -- so, I'm unsure what, if anything, I've found out.
##Additional Profile Information
[3] http://i.stack.imgur.com/ENocy.png
Augusto suggested looking at the memory profile. There are 1500+ `int[]` that are listed as "unreachable, but not yet collected." These are surely the `int[]` arrays that the `peer.getRGBPixels()` creates, but for some reason they're not being destroyed. This additional info, unfortunately, only adds to my confusion, as I'm not sure why the GC wouldn't be collecting them
##Profile using small heap argument -Xmx256m:
At irreputable and Hot Licks suggestion I set the max heap size to something significantly smaller. While this does prevent it from making the 1gb jump in memory usage, it still doesn't explain why the program is ballooning to its max heap size upon entering the 4th iteration.
[4] http://i.stack.imgur.com/bR3NP.png
As you can see, the exact issue still exists, it's just been made smaller. ;) The issue with this solution is that the program, for some reason, is still eating through all of the memory it can -- there is also a marked change in fps performance from the first the iterations, which consume very little memory, and the final iteration, which consumes as much memory as it can.
The question remains why is it ballooning at all?
##Results after hitting "Force Garbage Collection" button:
At jtahlborn's suggestion, I hit the Force Garbage Collection button. It worked beautifully. It goes from 1gb of memory usage, down to the basline of 60mb or so.
[5] http://i.stack.imgur.com/x4282.png
So, this seems to be the cure. The question now is, how do I pro grammatically force the GC to do this?
##Results after adding local Peer to function's scope:
At David Waters suggestion, I modified the `createArrayCapture()` function so that it holds a local `Peer` object.
Unfortunately no change in the memory usage pattern.
[6] http://i.stack.imgur.com/Ky5vb.png
Still gets huge on the 3rd or 4th iteration.
#Memory Pool Analysis:
###ScreenShots from the different memory pools
##All pools:
[7] http://i.stack.imgur.com/nXXeo.png
##Eden Pool:
[8] http://i.stack.imgur.com/R4ZHG.png
##Old Gen:
[9] http://i.stack.imgur.com/gmfe2.png
Just about all of the memory usage seems to fall in this pool.
Note: PS Survivor Space had (apparently) 0 usage
##I'm left with several questions:
(a) does the Garbage Profiler graph mean what I think it means? Or am I confusing correlation with causation? As I said, I'm in an unknown area with these issues.
(b) If it is the garbage collector... what do I do about it..? Why is it stopping altogether, and then running at a reduced rate for the remainder of the program?
(c) How do I fix this?
Does anyone have any idea what's going on here?
[1]: http://i.stack.imgur.com/sqqtS.png
[2]: http://i.stack.imgur.com/fSTOs.png
[3]: http://i.stack.imgur.com/ENocy.png
[4]: http://i.stack.imgur.com/bR3NP.png
[5]: http://i.stack.imgur.com/x4282.png
[6]: http://i.stack.imgur.com/Ky5vb.png
[7]: http://i.stack.imgur.com/nXXeo.png
[8]: http://i.stack.imgur.com/R4ZHG.png
[9]: http://i.stack.imgur.com/gmfe2.png
Edited by: 991051 on Feb 28, 2013 11:30 AM
Edited by: 991051 on Feb 28, 2013 11:35 AM
Edited by: 991051 on Feb 28, 2013 11:36 AM
Edited by: 991051 on Mar 1, 2013 9:44 AM

SO came through.
Turns out this issue was directly related to the garbage collector. The default one, for whatever reason, would get behind on its collection at points, and thus the memory would balloon out of control, which then, once allocated, became the new normal for the GC to operate at.
Manually setting the GC to ConcurrentMarkSweep solved this issue completely. After numerous tests, I have been unable to reproduce the memory issue. The garbage collector does an excellent job of keeping on top of these minor collections.

Heap size memory error on WebI Reports

Hello,
I'm developping my own JDBC driver to report specific data in Business Objects. I've actually an universe build on this driver and a web intelligence report. When I try to request I've an heap size error due to the size of my jvm. My JBDC driver is deployed thanks to a jar file. Normally I can increase jvm size with the argument -Xmx256M in command-line.
I tried several things :
I modified register HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Session Manager/Subsystems, SharedSection to 1024,3072,1024
I passed Tomcat's memory to 1024, I can't more because I'm on 32 bits on Windows Server 2003.
I tried to add MAX_HEAP_SIZE=1024000000 on webi.properties in c:\programfiles\Tomcat\webapps\businessobjects\enterprise115\desktoplaunch\WEB-INF\classes\, as explained on a post,but this directory doesn't exist, but there is 4 different webi.properties files one in C:\Program Files\Business Objects\Tomcat55\webapps\PerformanceManagement\WEB-INF\lib so I added max heap size parameter in this one.
I improved my JDBC-driver to avoid memory leak, and BO requests to limit results.
But I still have an heap size error.
Some people have other ideas to solve my problem ?
Best regards.
BO XI 3.1 Service Pack 2 HotFix 1
Tomcat 5.5 : 1024Mo memory allocation
Windows Server 2003 32bits

Hi Hizam,
1. Go to universe and click on View--> Structure
2. Check objects and Conditions.
3. If you found any changes then re-export your universe and run queries.
Once everything goes fine then Schedule the report.
Hope it helps you....!!
Thank You!

Any way to increase the default Heap size for all Java VMs in Solaris 8

Hello,
I have a java product that deals with large databases under Solaris 8. It is a jar file, started by a cron job every night. Some nights it will fail because it runs out of Heap memory depending on the amount of records it has to deal with. I know that I could increase the java VM heap size with "java -jar -mx YY JARFILE" command but I have other java products that are showing the same behavior, and I would like to correct them all in one shot if possible.
What I would like to do is find a system or configuration parameter that forces all Java VMs to use a larger MAX Heap size than the default 16M specified in the Man page for Java. Is there a way to accomplish that?
TIA
Maizo

You could always download the source and modify it.

Where do i change the heap size?

have the application installed and functional, most setup is complete.
When i'm working with the application we have running on the app server, i am only able to work for around 30 minutes before heap errors prevent further use with the site.
where do i change the allocated heap size?
within the portal?
on the server?
Running Windows and Oracle App Server

here is the file i have to work with....
<?xml version = '1.0' encoding = 'UTF-8'?>
<opmn xmlns="http://www.oracle.com/ias-instance">
<log path="$ORACLE_HOME\opmn\logs\opmn.log" comp="internal;ons;pm" rotation-size="1500000"/>
<debug path="$ORACLE_HOME\opmn\logs\opmn.dbg" comp="internal" rotation-size="1500000"/>
<notification-server>
<port local="6100" remote="6200" request="6003"/>
<ssl enabled="true" wallet-file="$ORACLE_HOME\opmn\conf\ssl.wlt\default"/>
</notification-server>
<process-manager>
<process-modules>
<module path="$ORACLE_HOME\opmn\lib\libopmnohs">
<module-id id="OHS"/>
</module>
<module path="$ORACLE_HOME\opmn\lib\libopmnoc4j">
<module-id id="OC4J"/>
</module>
<module path="$ORACLE_HOME\opmn\lib\libopmncustom">
<module-id id="CUSTOM"/>
</module>
<module path="$ORACLE_HOME\opmn\lib\libopmniaspt">
<module-id id="IASPT"/>
</module>
</process-modules>
<ias-instance id="detqas.ARC-MCAC-VW018.amc.faa.gov" name="detqas.ARC-MCAC-VW018.amc.faa.gov">
<environment>
<variable id="TMP" value="C:\DOCUME~1\DENNIS~1\LOCALS~1\Temp"/>
</environment>
<module-data>
<category id="start-parameters">
<data id="routing-id" value="g_rt_id"/>
</category>
</module-data>
<ias-component id="ASG" status="enabled" id-matching="true">
<process-type id="ASG" module-id="CUSTOM">
<environment>
<variable id="OS" value="Windows_NT"/>
</environment>
<start timeout="600"/>
<stop timeout="120"/>
<process-set id="ASG" numprocs="1">
<module-data>
<category id="start-parameters">
<data id="start-executable" value="D:\product\10.1.3\OracleAS\jdk\bin\java"/>
<data id="start-args" value="-ms20m -Djava.library.path=D:\product\10.1.3\OracleAS\bin;D:\product\10.1.3\OracleAS\dsa\bin;D:\product\10.1.3\OracleAS\oui\lib\win32 -classpath D:\product\10.1.3\OracleAS\dsa\jlib;D:\product\10.1.3\OracleAS\dsa\jlib\duf.jar;D:\product\10.1.3\OracleAS\lib\dms.jar;D:\product\10.1.3\OracleAS\oui\jlib\OraInstaller.jar;D:\product\10.1.3\OracleAS\jlib\srvm.jar;D:\product\10.1.3\OracleAS\jlib\netcfg.jar;D:\product\10.1.3\OracleAS\lib\xmlparserv2.jar;D:\product\10.1.3\OracleAS\assistants\jlib\assistantsCommon.jar;D:\product\10.1.3\OracleAS\jdbc\lib\classes12.zip;D:\product\10.1.3\OracleAS\jdbc\lib\nls_charset12.zip;D:\product\10.1.3\OracleAS\jlib\share.jar;D:\product\10.1.3\OracleAS\opmn\lib\optic.jar;D:\product\10.1.3\OracleAS\j2ee\home\jazn.jar;D:\product\10.1.3\OracleAS\jlib\ldapjclnt10.jar oracle.duf.dufserver.DufServer D:\product\10.1.3\OracleAS\dsa\dsa.conf"/>
</category>
</module-data>
</process-set>
</process-type>
</ias-component>
<ias-component id="HTTP_Server">
<process-type id="HTTP_Server" module-id="OHS">
<environment>
<variable id="PERL5LIB" value="D:\product\10.1.3\OracleAS\Apache\Apache\mod_perl\site\5.8.3\lib\MSWin32-x86-multi-thread;$ORACLE_HOME\perl\5.8.3\lib;$ORACLE_HOME\perl\site\5.8.3\lib"/>
<variable id="PHPRC" value="D:\product\10.1.3\OracleAS\Apache\Apache\conf"/>
<variable id="PATH" value="$ORACLE_HOME\Perl\5.8.3\bin\MSWin32-x86-multi-thread" append="true"/>
</environment>
<module-data>
<category id="start-parameters">
<data id="start-mode" value="ssl-enabled"/>
</category>
</module-data>
<process-set id="HTTP_Server" numprocs="1"/>
</process-type>
</ias-component>
<ias-component id="IASPT" status="disabled">
<environment>
<variable id="LD_LIBRARY_PATH" value="D:\product\10.1.3\OracleAS/lib" append="true"/>
</environment>
<process-type id="IASPT" module-id="IASPT" working-dir="D:\product\10.1.3\OracleAS/iaspt/bin">
<port id="ajp" range="7501-7600"/>
<process-set id="IASPT" numprocs="1"/>
</process-type>
</ias-component>
<ias-component id="OC4J">
<process-type id="home" module-id="OC4J" status="enabled">
<module-data>
<category id="start-parameters">
<data id="java-options" value="-Xrs -server -Djava.security.policy=$ORACLE_HOME/j2ee/home/config/java2.policy -Djava.awt.headless=true -Dhttp.webdir.enable=false"/>
</category>
<category id="stop-parameters">
<data id="java-options" value="-Djava.security.policy=$ORACLE_HOME/j2ee/home/config/java2.policy -Djava.awt.headless=true -Dhttp.webdir.enable=false"/>
</category>
</module-data>
<start timeout="600" retry="2"/>
<stop timeout="120"/>
<restart timeout="720" retry="2"/>
<port id="default-web-site" range="12501-12600" protocol="ajp"/>
<port id="rmi" range="12401-12500"/>
<port id="jms" range="12601-12700"/>
<process-set id="default_group" numprocs="1"/>
</process-type>
</ias-component>
</ias-instance>
</process-manager>
</opmn>
I'm working with the Enterprise Manager 10g console.
I can find the current monitoring of the heap space used in percentage, but cant find where to adjust it or increase it's space.
searching around.
thanks! but still searching...

NetBeans and Heap Size

I'm trying to write a program using NetBeans and I keep getting OutOfMemoryErrors. I have 2GB of RAM and I've attempted to modify the netbeans.conf file to increase the heap size at startup. The changes I've made aren't being reflected in the memory manager tool (it still indicates a maximum size of ~50MB). The pertinent code from the config file is as follows:
netbeans_default_options="-J-Xms512m -J-Xmx1024m -J-XX:PermSize=128m -J-XX:MaxPermSize=512m -J-Xverify:none -J-Dapple.laf.useScreenMenuBar=true -J-XX:NewSize256m"
Assuming my memory usage won't exceed these limits, any suggestions as to how to make sure the changes are being implemented?

I would subscribe to the netbeans user mail list, and pose your question to that list. The Sun Netbeans gurus live there.
I would also use a seperate email account to subscribe to the list as it generates alot of messages daily. If thats not an option, definatly try to set up a rule that seperates messages from the list from your regular email.
The main netbeans top level mail list web page is here with all the instructions to subscribe and unsubscribe.
Good luck,
JJ

How large heap size for running a WL Server?

Hi friends,
I am running a 5.1 WL server, which usually uses more than 170Mb or even
more if I deploy EjBs.
Is that usully a server will use this much of memory?
If I want to reduce usage of heap size, what can I do?
Thanks!
James

Hi Sathya,
If you are not having any memory leaking and have a fair amount of memory allocated on one server for your application then I would suggest you to go with the increasing the number of servers in the cluster. That way you would have a distributed architecture and performance would increase.
For better tuning you can have a look at the below links
Topic: Optimizing WebLogic Server Performance: JVM tuning
http://middlewaremagic.com/weblogic/?p=6388
Topic: Tuning the WebLogic Server Performance
http://middlewaremagic.com/weblogic/?p=6384
Regards,
Ravish Mody

Managed Servers vs. Admin Server - heap sizes

I have a question. I opened a support ticket with BEA yesterday, the technician got back to me and completely confused the hell out of me.
We're looking to upgrade to WLS10 with an admin server/managed server design. I was under the impression that each server instance, when fired up, starts up in its own JVM with its own memory allocations. If I set the admin server startup script to have a min and max of 1024, the managed server starts up with the same memory settings. The technician I spoke with yesterday from BEA support to clarify this then explains to me that each server instance, admin and managed, do not exist in their own JVMs but that they share the same JVM. I found verbage in the documentation that says the complete opposite...that one server instance can only exist in one JVM...SO if I have the admin server with 1024 and the managed server with 1024 and the machine only has 2 gigs, that's pretty much all I can have running on this machine, right?
The thing I don't understand at all is why would I want the admin server and my application on the managed server to use the same amount of ram? My managed server should have way more ram available to it than the admin server which is rarely used throughout the day. Is there a way to set the admin server to 512 and then fire up the managed server with a gig and a half?
I would think it makes more sense that you specify a different heap size for the admin versus the managed...but maybe not. What is the recommended heap size for the admin server? Is it strictly recommended to let them all use the same heap size settings? Can someone explain why I'd want the admin server to have access to the same amount my heavyweight, client-hit-all-day-long application?
Any help would be greatly appreciated.
Cheers,
rlb

Thanks David. As God as my witness, the tech seriously told me that they all use the same JVM. Then I got seriously confused, like I was an idiot and didn't understand what a JVM was and I started second-guessing myself. The whole conversation was very strange and yes, there was definitely a language barrier and I'm guessing I just wasn't being clear enough...I don't know...all I know is I walked away from the phone call in worse shape then when I first opened the ticket.
At any rate, do you have recommendations for admin server ram? I know there are performance tuning tools to help us figure out the optimum settings for our managed server, and I plan on implementing them...but going back to the ram for the Admin server, versus managed server...is there a recommended way of specifying different heap size for the managed servers? Is the recommended way to set the the -Xms and -Xmx settings via the 'Arguments' field on Environment > Servers > serverName > Configuration > Server Start tab via the admin console?
Thanks again for your quick reply!
Cheers,
rlb

Java heap size....

Hi guys,
i need absolutely your help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I use Exadel Studio with Eclipse and Server Tomcat 5.0 embedded.
I need to enlarge Tomcat heap size.
Can you help me?
I've read many posts but i'm a bit confused. Does exists a graphical tool that allow me to operate on Tomcat Server?
Can i install it with my configuration?
When i've modified configuration how can i see if it has gone well?
Does exists a command that say me what's the current available heap size?
Thanks very much....

thanks...
excuse my inexperience,i don't understand if i have to enlarge jvm heap size or Tomcat heap size?
Are they the same?
Thanks,i'm waiting for your reply...

How to increase JVM Heap Size

Hi all,
Our Environment
===============
OS - Windows XP Service Pack 3
Oracle Developer Suite - 10.1.2.3.0
Oracle Forms & Reports Service 10.1.2.3.0
Oracle Database 10.2.0.1.0
JDK 1.5
Jinitiator 1.3.1.30
Apache POI 3.5
From forms we are writing to excel files after copying XL template using Apache POI 3.5 and JDK 1.5. This XL template file has got lot of macros.
We have imported the Java class files into form as pl/sql library. We are able to write upto 7Mb size of XL file. Beyond that size it comes with the error Ora-105101.
We tried to increase the JVM Heap Size to 640M by setting values -Xmx640M everywhere in OC4J_BI_FORMS/Server Properties/Java Options, Home/Server Properties/Java Options through Enterprise Manager console. Also manually set the values in OPMN.XML and reloaded the same. Also set -Xmx640M in Jinitiator 1.3.1.30 Java Runtime Parameters. Also set in Java console. All settings have no effect.
We have written a small program to display the run time memory from forms, which displays only maximum memory 63M all the time.
PACKAGE BODY HeapSize IS
-- DO NOT EDIT THIS FILE - it is machine generated!
args JNI.ARGLIST;
-- Constructor for signature ()V
FUNCTION new RETURN ORA_JAVA.JOBJECT IS
BEGIN
args := NULL;
RETURN (JNI.NEW_OBJECT('HeapSize', '()V', args));
END;
-- Method: getTotalMemory ()D
FUNCTION getTotalMemory(
obj ORA_JAVA.JOBJECT) RETURN NUMBER IS
BEGIN
args := NULL;
RETURN JNI.CALL_DOUBLE_METHOD(FALSE, obj, 'HeapSize', 'getTotalMemory', '()D', args);
END;
-- Method: getMaxMemory ()D
FUNCTION getMaxMemory(
obj ORA_JAVA.JOBJECT) RETURN NUMBER IS
BEGIN
args := NULL;
RETURN JNI.CALL_DOUBLE_METHOD(FALSE, obj, 'HeapSize', 'getMaxMemory', '()D', args);
END;
BEGIN
NULL;
END;
declare
obj ORA_JAVA.JOBJECT;
BEGIN
obj:=HeapSize.new;
message('Total memory '||HeapSize.getTotalMemory(obj));
message('Max memory '||HeapSize.getMaxMemory(obj));
END;
Below procedure is for writing to Excel file.
============================================
PACKAGE BODY UWWriteExcel IS
-- DO NOT EDIT THIS FILE - it is machine generated!
args JNI.ARGLIST;
-- Constructor for signature ()V
FUNCTION new RETURN ORA_JAVA.JOBJECT IS
BEGIN
args := NULL;
RETURN (JNI.NEW_OBJECT('UWWriteExcel', '()V', args));
END;
-- Method: copyExcel (Ljava/lang/String;Ljava/lang/String;)V
PROCEDURE copyExcel(
obj ORA_JAVA.JOBJECT,
a0 VARCHAR2,
a1 VARCHAR2) IS
BEGIN
args := JNI.CREATE_ARG_LIST(2);
JNI.ADD_STRING_ARG(args, a0);
JNI.ADD_STRING_ARG(args, a1);
JNI.CALL_VOID_METHOD(FALSE, obj, 'UWWriteExcel', 'copyExcel', '(Ljava/lang/String;Ljava/lang/String;)V', args);
END;
-- Method: getSpreadSheetPara (Ljava/lang/String;)V
PROCEDURE getSpreadSheetPara(
obj ORA_JAVA.JOBJECT,
a0 VARCHAR2) IS
BEGIN
args := JNI.CREATE_ARG_LIST(1);
JNI.ADD_STRING_ARG(args, a0);
JNI.CALL_VOID_METHOD(FALSE, obj, 'UWWriteExcel', 'getSpreadSheetPara', '(Ljava/lang/String;)V', args);
END;
-- Method: openSheet (I)V
PROCEDURE openSheet(
obj ORA_JAVA.JOBJECT,
a0 NUMBER) IS
BEGIN
args := JNI.CREATE_ARG_LIST(1);
JNI.ADD_INT_ARG(args, a0);
JNI.CALL_VOID_METHOD(FALSE, obj, 'UWWriteExcel', 'openSheet', '(I)V', args);
END;
-- Method: getCellValues (IID)V
PROCEDURE getCellValues(
obj ORA_JAVA.JOBJECT,
a0 NUMBER,
a1 NUMBER,
a2 NUMBER) IS
BEGIN
args := JNI.CREATE_ARG_LIST(3);
JNI.ADD_INT_ARG(args, a0);
JNI.ADD_INT_ARG(args, a1);
JNI.ADD_DOUBLE_ARG(args, a2);
JNI.CALL_VOID_METHOD(FALSE, obj, 'UWWriteExcel', 'getCellValues', '(IID)V', args);
END;
-- Method: getCellValues (IILjava/lang/String;)V
PROCEDURE getCellValues(
obj ORA_JAVA.JOBJECT,
a0 NUMBER,
a1 NUMBER,
a2 VARCHAR2) IS
BEGIN
args := JNI.CREATE_ARG_LIST(3);
JNI.ADD_INT_ARG(args, a0);
JNI.ADD_INT_ARG(args, a1);
JNI.ADD_STRING_ARG(args, a2);
JNI.CALL_VOID_METHOD(FALSE, obj, 'UWWriteExcel', 'getCellValues', '(IILjava/lang/String;)V', args);
END;
-- Method: exportExcel ()V
PROCEDURE exportExcel(
obj ORA_JAVA.JOBJECT) IS
BEGIN
args := NULL;
JNI.CALL_VOID_METHOD(FALSE, obj, 'UWWriteExcel', 'exportExcel', '()V', args);
END;
-- Method: copy (Ljava/lang/String;Ljava/lang/String;)V
PROCEDURE copy(
a0 VARCHAR2,
a1 VARCHAR2) IS
BEGIN
args := JNI.CREATE_ARG_LIST(2);
JNI.ADD_STRING_ARG(args, a0);
JNI.ADD_STRING_ARG(args, a1);
JNI.CALL_VOID_METHOD(TRUE, NULL, 'UWWriteExcel', 'copy', '(Ljava/lang/String;Ljava/lang/String;)V', args);
END;
BEGIN
NULL;
END;
declare
obj ORA_JAVA.JOBJECT;
BEGIN
message('-1');pause;
obj:=UWWriteExcel.new;
message('0');pause;
UWWriteExcel.copyExcel(obj,'C:\\excel\\CAT2009WS.XLS','C:\\excel\\CAT2009WS.XLS');
message('1');pause;
UWWriteExcel.openSheet(obj,0);
message('2');pause;
UWWriteExcel.getCellValues(obj,6,2,900);
message('3');pause;
UWWriteExcel.getCellValues(obj,7,2,911);
message('4');pause;
UWWriteExcel.exportExcel(obj);
END;
When the size of XL is more than 7Mb, after message(0) it will be display oracle error.
From command prompt if we run the same java class file by passing -Xmx256m parameter we are able to write to big XL file.
Can anyone tell me where I am wrong... Can we increase the JVM Heap Size from forms...

I have a simular problem.
Via Forms I call a Java class (import Java class -> PL/SQL class java method).
For this specific process I need to set the Xmx java option...
How do I do this ?
Changing the java option for the Forms-OC4J in the EM doesn't help.
Is there an other level where I can modify this ?
Does the java process of the forms is the single process that exists ? How does he handles such java calls?
Are that separed java processes ? threads ? ....
Thanks !!!

Java.lang.OutOfMemoryError:class Your Java heap size might be set too high.

I am getting the below error while deploying some soa applications in WLS 10.3 on solaris platform.As a workaround,
the server instance has to be restarted everytime i make the deployments when i face this OOM situations.
usually i face this issue after first deployment onwards.
So, everytime i make the next deployment the server instance has to be restarted before that.
The server is configured with 1Gb JVM and runs on JRockit jrrt-4.0.0-1.6.0.
MEM_ARGS="-Xms1g -Xmx1g -Xgcprio:throughput -Xverbose:gc -XX:+HeapDumpOnOutO
fMemoryError -XXcompressedRefs:enable=true"
Can anybody please provide any pointers to track/solve this issue?
Log extract:
####<Oct 10, 2010 4:27:31 PM PST> <Error> <Deployer> <BOX1> <SERVER2> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <1256893524756> <BEA-149265> <Failure occurred in the execution of deployment request with ID '1256893524756' for task '3'. Error is: 'weblogic.application.ModuleException: '
weblogic.application.ModuleException:
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1373)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:468)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:201)
at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:118)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:205)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:28)
at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:636)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
at weblogic.application.internal.EarDeployment.activate(EarDeployment.java:16)
at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:162)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:569)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:140)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:106)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:323)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:820)
at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1223)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:436)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:164)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:68)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
java.lang.OutOfMemoryError: class allocation, 21977184 loaded, 20M footprint in check_alloc (classalloc.c:213) 1412 bytes requested.
Java heap 1G reserved, 1G committed
Paged memory=18014398507524232K/16781304K.
Your Java heap size might be set too high.
Try to reduce the Java heap
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:335)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:288)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:256)
at java.lang.ClassLoader.loadClass(ClassLoader.java:303)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:176)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:1058)
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:1129)
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:542)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:435)
at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:465)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:175)
at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1784)
at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2999)
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1371)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:468)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27)
at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:635)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
at weblogic.application.internal.EarDeployment.activate(EarDeployment.java:16)
at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:162)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:79)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:569)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:140)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:106)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:323)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:820)
at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1227)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:436)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:163)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:67)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

Its running on Solaris 10 platform.The server is configured with 1Gb JVM and JRockit jrrt-4.0.0-1.6.0.
MEM_ARGS="-Xms1g -Xmx1g -Xgcprio:throughput -Xverbose:gc -XX:+HeapDumpOnOutO
fMemoryError -XXcompressedRefs:enable=true"
Let me know if you need any more information to track this issue.

Modifying heap size allocated to glassfish...

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