Increasing JVM memory size at runtime

I want to increase the JVM memory size at runtime.
I found out that I can do this with oracle.aurora.vm.OracleRuntime.setMaxMemorySize(...)
Which JAR do I have to put on the classpath to be able to acces OracleRuntime???
What would be the proper implementation to incerase the memory size?

aurora.zip

Similar Messages

Increase JVM memory size in build.xml?

Hi,
I want to know if it is possible to increase the JVM memory size in the "build.xml" file of my java fx project itself?If so,how to go about it?
Thanks a lot.

I think you can achieve that by specifying <fx:jvmarg>.
For example:
<fx:deploy width="${applet.width}"
               height="${applet.height}"
               embedJNLP="true"
               nativeBundles="all"
                  outdir="${dist.dir}"
               outfile="${application.title}"
               verbose="true">
     
     <fx:platform javafx="2.2+" j2se="7.0">
          <fx:jvmarg value="-Xms64M"/>
          <fx:jvmarg value="-Xmx512M"/>
     </fx:platform>
</fx:deploy>Hope that helps!
Edited by: ytw on Nov 16, 2012 12:30 PM

How to Increase the memory size of a File in the Application Server

Hello Abaper's
I have generated a XML file for the data of internal table (with 10 Records). When i download , i can see the XML file for the Entire 10 Records.
But , while transferring the XML file to Applicationserver , it's transferring only upto max 4 Records.I     assume that the memory is insufficient to allocate 10 Records. Can we Increase the Memory size of the File on Application server. OR, is there any error in My Source Code.
Code i used to Transfer the XML File to Application server.
OPEN DATASET FNAME FOR OUTPUT IN BINARY MODE.
IF sy-subrc EQ 0.
   LOOP AT it_xmltab INTO wa_xmltab.
       TRANSFER wa_xmltab TO FNAME.
   ENDLOOP.
ELSE.
MESSAGE e004(zmsg5) WITH 'File FNAME not opened'.
ENDIF.
CLOSE DATASET FNAME.
Regards
Jv

Hi,
DATA : filename TYPE rlgrap-filename.
DATA : doc_name TYPE char30.
DATA : bin_size TYPE i.
SELECT matnr matkl meins
       FROM mara INTO TABLE it_mara
       UP TO 10 ROWS.
CALL FUNCTION 'SAP_CONVERT_TO_XML_FORMAT'
EXPORTING
    i_filename           = filename
    i_xml_doc_name       = doc_name
IMPORTING
    pe_bin_filesize      = bin_size
TABLES
    i_tab_sap_data       = it_mara         " contains 10 Records
CHANGING
    i_tab_converted_data = it_xmltab.
placing XML File in Appl. Server
DATA : FNAME(60) VALUE 'xyz_File'.
DATA : num TYPE i.
DATA : xmldata(256) TYPE x.
For Writing The data in Application Server
OPEN DATASET FNAME FOR OUTPUT IN BINARY MODE. " ENCODING DEFAULT.
IF sy-subrc EQ 0.
LOOP AT it_xmltab INTO wa_xmltab.
    TRANSFER wa_xmltab TO FNAME.
ENDLOOP.
ELSE.
MESSAGE e004(zmsg5) WITH 'File FNAME not opened'.
ENDIF.
CLOSE DATASET FNAME.
For Reading The data in Application Server
OPEN DATASET FNAME FOR INPUT IN BINARY MODE. " ENCODING DEFAULT.
DO.
IF sy-subrc EQ 0.
    READ DATASET fname INTO xmldata.
    WRITE :/ xmldata.
    Clear xmldata.
ELSE.
    EXIT.
ENDIF.
ENDDO.
CLOSE DATASET FNAME.
at runtime i can see
it_mara --> contain 10 records
it_xmltab --> contain 7 lines (Each line size is 255 char). This table have XML format data, (unknow format , with all numeric
                    digits)
it_xmltab is trasferred to application server , but the xml format is generated upto 4 records, and for the remaining records
the XML format is not generated.
the XML data in application server file is
<?xml version="1.0"?><TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">0-BUY1</MATNR><MATKL Datatype="C" Length="18">012</MATKL><MEINS Datatype="C" Length="6">PC
</MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">0-BUY2</MATNR><MATKL Datatype="C" Length="18">012</MATKL><MEINS Datatype="C" Length="6">
PC </MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">000000000000000001</MATNR><MEINS Datatype="C" Length="6">EA</MEINS>
</TY_MARA><TY_MARA><MATNR Datatype="C" Length="36">000000000000000002</MATNR
Regards
JV

Increase JVM memory using Java Code

Hi Friends
I am in a critical situtation and not able get the solution. My application is huge and need of increase in JVM memory. I am able to increase JVM memory in command prompt
java -Xmx500m classname
Simarly I am able to run jar file also
java -Xmx500m -jar sample.jar
I need to know how to set JVM memory for executable JAR. When I just double-click the JAR application load and i am getting Out Of Memory. I dont what ti use command prompt to execute. Please help me with this program. Thanks in advance

I gone through the code of ImageJ software. ImageJ is
a freeware and wrtten in Java. They are setting jvm
memory in code, getting the description of the code
was difficult.
long memoryBytes =
s = Runtime.getRuntime().maxMemory();
     long memoryMB = memoryBytes/1024/1024;
     long memoryDiff = memoryMB - 64;
String s = "Runtime.maxMemory: " + memoryMB +
B + "MB\n";
     s = s + "Difference: " + memoryDiff + "MB";
     System.out.println("s..." + s);
The above code will give you the memory allocated for JVM. Yes.
When there is a way to find the memory space,
there should be some way to set it. No.
I am still trying to set the memory in code r using external resource.Read reply 4.
I want to just give the executable jar to users. They
are not satisified with the bat file and hidding
command prompt in background.You may be able to use Runtime.exec() to launch another instance of java, with whatever heap setting you desire.

Increasing the Frame size at runtime

hi
Iam using a JFrame and i have two JPanel on it.Iam getting the input from the user through the controls which is placed on the panel.I have two buttons namely "Calculate" and "Clear" on the Frame.When the user presses the "Calculate" button Iam doing some calculations based on the input given by the user and i want to display the output of the calculations on the bottom of the Frame by increasing the Frame size at runtime.How can i do it?.Suggest me also about the Layout to be used.
thanks

In the frame i want the controls to appear as
Panel1
Panel2
Button1 Button2 Button3
When i use BorderLayout for the Frame it appears as
Panel1
Button1 Panel2 Button2
Button3
Note:Iam using NetBeans IDE for developing the GUI.I do not know which property of
the controls to be changed so as to place the controls in NORTH,SOUTH etc
can u suggest me some other Layout so that my Frame will appear as mentioned above.I looked into the Layout Manager but iam not getting much ideas in this regard.Please help me...

How to increase JVM memory for Web Logic 10.3.3 - OSB 11g

Hello folks,
I am running OSB 11g on WebLogic 10.3.3 to call some services passing large XMLs requests. These XMLs are something around 10mb each. Unfortunately, I got errors regarding memory.
I am using Eclipse with OSB plugin to develop, and I have configured the weblogic server to start up it from the eclipse, thus I don't need to start up through command line.
I would like to know where I can change the memory arguments to start up the JVM which runs the WebLogic server. As I am starting up the server from eclipse, I can't change the memory size args from command line.
Is there a file where those arguments are stored? or some configuration on WebLogic console which I can increase the Xms and Xmx ?
The JVM is jrockit_160_17_R28.0.0-679
This is the eclipse console output when the server is starting up:
JAVA Memory arguments: -Xms256m -Xmx512m
WLS Start Mode=Development
CLASSPATH=C:\Davi\osb\mw_1033\WLSERV~1.3\server\ext\jdbc\oracle\11g\ojdbc6dms.jar;;C:\Davi\osb\mw_1033\OSB_OR~1\modules\features\osb.server.modules_11.1.1.3.jar;C:\Davi\osb\mw_1033\patch_wls1033\profiles\default\sys_manifest_classpath\weblogic_patch.jar;C:\Davi\osb\mw_1033\patch_oepe1033\profiles\default\sys_manifest_classpath\weblogic_patch.jar;C:\Davi\osb\mw_1033\JROCKI~1.0-6\lib\tools.jar;C:\Davi\osb\mw_1033\WLSERV~1.3\server\lib\weblogic_sp.jar;C:\Davi\osb\mw_1033\WLSERV~1.3\server\lib\weblogic.jar;C:\Davi\osb\mw_1033\modules\features\weblogic.server.modules_10.3.3.0.jar;C:\Davi\osb\mw_1033\WLSERV~1.3\server\lib\webservices.jar;C:\Davi\osb\mw_1033\modules\ORGAPA~1.1/lib/ant-all.jar;C:\Davi\osb\mw_1033\modules\NETSFA~1.0_1/lib/ant-contrib.jar;C:\Davi\osb\mw_1033\osb_ora11g\soa\modules\oracle.soa.common.adapters_11.1.1\oracle.soa.common.adapters.jar;C:\Davi\osb\mw_1033\ORACLE~1\modules\oracle.jrf_11.1.1\jrf.jar;C:\Davi\osb\mw_1033\OSB_OR~1\lib\version.jar;C:\Davi\osb\mw_1033\OSB_OR~1\lib\alsb.jar;C:\Davi\osb\mw_1033\OSB_OR~1\3rdparty\lib\j2ssh-ant.jar;C:\Davi\osb\mw_1033\OSB_OR~1\3rdparty\lib\j2ssh-common.jar;C:\Davi\osb\mw_1033\OSB_OR~1\3rdparty\lib\j2ssh-core.jar;C:\Davi\osb\mw_1033\OSB_OR~1\3rdparty\lib\j2ssh-dameon.jar;C:\Davi\osb\mw_1033\OSB_OR~1\3rdparty\classes;C:\Davi\osb\mw_1033\OSB_OR~1\lib\external\log4j_1.2.8.jar;C:\Davi\osb\domains\INFOLE~1\config\osb;C:\Davi\osb\mw_1033\WLSERV~1.3\common\derby\lib\derbynet.jar;C:\Davi\osb\mw_1033\WLSERV~1.3\common\derby\lib\derbyclient.jar;C:\Davi\osb\mw_1033\WLSERV~1.3\server\lib\xqrl.jar
PATH=C:\Davi\osb\mw_1033\patch_wls1033\profiles\default\native;C:\Davi\osb\mw_1033\patch_oepe1033\profiles\default\native;C:\Davi\osb\mw_1033\WLSERV~1.3\server\native\win\32;C:\Davi\osb\mw_1033\WLSERV~1.3\server\bin;C:\Davi\osb\mw_1033\modules\ORGAPA~1.1\bin;C:\Davi\osb\mw_1033\JROCKI~1.0-6\jre\bin;C:\Davi\osb\mw_1033\JROCKI~1.0-6\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\Microsoft Application Virtualization Client;C:\Program Files\Attachmate\Reflection\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Davi\osb\mw_1033\WLSERV~1.3\server\native\win\32\oci920_8
* To start WebLogic Server, use a username and *
* password assigned to an admin-level user. For *
* server administration, use the WebLogic Server *
* console at http:\\hostname:port\console *
starting weblogic with Java version:
java version "1.6.0_17"
Java(TM) SE Runtime Environment (build 1.6.0_17-b04)
Oracle JRockit(R) (build R28.0.0-679-130297-1.6.0_17-20100312-2123-windows-ia32, compiled mode)
Starting WLS with line:
C:\Davi\osb\mw_1033\JROCKI~1.0-6\bin\java -jrockit -Xms256m -Xmx512m -Dweblogic.Name=AdminServer -Djava.security.policy=C:\Davi\osb\mw_1033\WLSERV~1.3\server\lib\weblogic.policy -Xverify:none -da -Dplatform.home=C:\Davi\osb\mw_1033\WLSERV~1.3 -Dwls.home=C:\Davi\osb\mw_1033\WLSERV~1.3\server -Dweblogic.home=C:\Davi\osb\mw_1033\WLSERV~1.3\server -Ddomain.home=C:\Davi\osb\domains\INFOLE~1 -Dcommon.components.home=C:\Davi\osb\mw_1033\ORACLE~1 -Djrf.version=11.1.1 -Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger -Djrockit.optfile=C:\Davi\osb\mw_1033\ORACLE~1\modules\oracle.jrf_11.1.1\jrocket_optfile.txt -Doracle.domain.config.dir=C:\Davi\osb\domains\INFOLE~1\config\FMWCON~1 -Doracle.server.config.dir=C:\Davi\osb\domains\INFOLE~1\config\FMWCON~1\servers\AdminServer -Doracle.security.jps.config=C:\Davi\osb\domains\INFOLE~1\config\fmwconfig\jps-config.xml -Djava.protocol.handler.pkgs=oracle.mds.net.protocol -Digf.arisidbeans.carmlloc=C:\Davi\osb\domains\INFOLE~1\config\FMWCON~1\carml -Digf.arisidstack.home=C:\Davi\osb\domains\INFOLE~1\config\FMWCON~1\arisidprovider -Dweblogic.alternateTypesDirectory=C:\Davi\osb\mw_1033\ORACLE~1\modules\oracle.ossoiap_11.1.1,C:\Davi\osb\mw_1033\ORACLE~1\modules\oracle.oamprovider_11.1.1 -Dweblogic.jdbc.remoteEnabled=false -Dweblogic.management.discover=true -Dwlw.iterativeDev= -Dwlw.testConsole= -Dwlw.logErrorsToConsole= -Dweblogic.ext.dirs=C:\Davi\osb\mw_1033\patch_wls1033\profiles\default\sysext_manifest_classpath;C:\Davi\osb\mw_1033\patch_oepe1033\profiles\default\sysext_manifest_classpath weblogic.Server
Thanks in advance,
Davinod
Edited by: user13631313 on Jan 10, 2011 10:07 AM

Hi Davinod,
Yes, the correct place is to change the memory arguments in the "setDomainEnv.cmd", however can you confirm if the changed memory arguments were reflected in the logs or not.
If yes then you need to try to increase the memory arguments again and test which is the best working memory argument suitable for your environment, this would take some trials.
However if the memory arguments are still not reflected then try to set it properly as shown below:
set MEM_ARGS=-Xms1024m -Xmx1024m
Regards,
Ravish Mody
http://middlewaremagic.com/weblogic/
Come, Join Us and Experience The Magic…

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 !!!

How to increase JVM Process size for WebLogic running SOA Applications.

Hi,
I believe 32 Bit OS can address up to 4GB memory so theoretically 32 Bit JVM can use 4GB but practical convention is 2GB as other 2GB is used by OS itself and also this default JVM Process size is set somewhere and I also believe that if JVM is 32 bit on 64Bit OS even though JVM will run on 32Bit Virtual Machine so JVM does not know that it is 64Bit OS in that case again it can use max Process default size up to 2GB.
And for 64Bit JVM, I can allocate more than 4GB depend on my available RAM size to Xmx, MaxPermSize parameters in java.exe file and after that I can set the same value in “setSOADomainEnv.cmd” or to “setDomainEnv.cmd” file.
But I am 99% sure by just assigning more memory value to Xmx, MaxPermSize in “setSOADomainEnv.cmd” file only won’t work (not setting Xmx in java.exe), if it would have worked then in my case when I was assigning 1536 to Xmx in “setSOADomainEnv.cmd” file then why it was showing out of memory error. I think that is because it was only taking default 2GB for my 32 Bit JVM not considering 3GB or 4GB. So i think i have to change default memory size what JVM can use (<http://www.wikihow.com/Increase-Java-Memory-in-Windows-7> but i am using windows 8 so for that I don’t know the option to change this default Process Size)
I also believe that first JVM start and before start it check how much memory it can use from it’s own –Xmx parameter in some ware configuration or java.exe file and after that it allocate that much size of JVM Process Memory in RAM then after it loads Weblogic or Java Applications in its (Heap + Non-heap + Native Area) which are parts of JVM Process memory
I read post on :< http://stackoverflow.com/questions/3143579/how-can-jvm-use-more-than-4gb-of-memory > and < http://alvinalexander.com/blog/post/java/java-xmx-xms-memory-heap-size-control >
All used :
java -Xmx64m -classpath ".:${THE_CLASSPATH}" ${PROGRAM_NAME}
java –Xmx6g //command which will call java/JVM interpreter which will hold –Xmx parameter to set Heap size for JVM
before JVM comes in memory (JVM process memory)
now my question is can I manually open any configuration file or java.exe same like “setSOADomainEnv.cmd” or “setDomainEnv.cmd” (I know since java.exe is exe I can’t open simply but I want similar work around)
so that I don’t need to type java –Xmx6g every time when I run weblogic (and then later I can change weblogic “setDomainEnv.cmd” Xmx and PermSize to more than default size 4GB to 5GB or 6GB in the case of 64Bit OS)
Please correct me if I am wrong in my understanding.
Thanks.

These days the VM will detect a "server" machine and set up the memory appropriate for that.
You can create a simple java console application and have it print the memory settings (find the appropriate java class fort that.)
There is of course the possibility that your application is running out of memory because it is doing something wrong and not because the VM doesn't have enough memory. You can force that in a test setup by LOWERING the maximum amount of memory and thus making it more likely that an out of memory exception will occur.

Increase JVM heap size when calling it from C++

I have a program that loads images and only works properly increasing heap.
java McVImg
gives me an Out of memory error.
java -Xmx120M McVImg
works fine.
If I want to call JVM from a C++ program using Java native interface,
How should I increase JVM heap ?
Thanks in advance. Ignasi Villagrasa.

I'm trying to do what you told me and it doesn't work.
I show the C++ code I'm using:
void JavaParam::LoadJVM()
     JavaVMInitArgs vm_args;
     JavaVMOption options[2];
jint res;
     vm_args.version = JNI_VERSION_1_2;
JNI_GetDefaultJavaVMInitArgs(&vm_args);
     if (res < 0)
fprintf(stderr, " Requested version is not supported\n");
          fputs ("Requested version is not supported\n",traza);
          fflush(traza);
exit(-1);
     //Establecemos classpath
     //Atencion el classpath ser� el jar
     //options[0].optionString = "-Djava.class.path=..";
     options[0].optionString = "-Djava.class.path=..\\mcjava.jar";
     options[1].optionString = "-Xmx120M";
     //Nuevos argumentos
vm_args.options=options;
     vm_args.nOptions = 2;
     vm_args.ignoreUnrecognized = JNI_FALSE;
     //Creamos Maquina Virtual Java
res = JNI_CreateJavaVM(&jvm,(void **)&env,&vm_args);
if (res < 0)
fprintf(stderr, "Can't create Java VM: %d\n",(int)res);
          fprintf(traza, "Can't create Java VM RES: %d \n",(int)res);
          fflush(traza);
exit(1);
     jvm_creada = 1;
Is that right ?
Thanks in advance. Ignasi Villagrasa.

Tomcat 6 increase JVM memory ?

How can I increase the memory of Apache Tomcat 6. Earlier i used to do it in catalina.bat. Now am not sure how to do them, as I have tomcat exe services in bin folder (OS:Windows). It would be great if any one could help me resolve this issue.
Thanks in advance.

hope that by now, you have the answer. If not, you can try the following:
Run \bin\tomcat6w.exe.
In the new window that is displayed, select the Java tab and change the following as per your requirements:
Initial memory pool
Maximum memory pool

Can I set JVM memory size when running applets?

Hi,
I have downloaded an applet that renders panoramic images and
I have a problem with Java memory. I remember that default maximum
size that applet can use is 70MB, and the problem is 70MB is
not enough when rendering big images. It is OK when I add
"-Xmx -Xms" parameters in the Java Control but I cannot tell
everyone who wants to see my images to go control panel, add
parameters etc..
So my question is...
Is it possible add "-Xmx -Xms" parameters inside the applet file
so that these parameters run automatically when executing applet?
Thanks in advance for your reply!
Hyung

Hi,
I have downloaded an applet that renders panoramic
images and
I have a problem with Java memory. I remember that
default maximum
size that applet can use is 70MB, and the problem is
70MB is
not enough when rendering big images. It is OK when I
add
"-Xmx -Xms" parameters in the Java Control but I
cannot tell
everyone who wants to see my images to go control
panel, add
parameters etc..
So my question is...
Is it possible add "-Xmx -Xms" parameters inside the
applet file
so that these parameters run automatically when
executing applet?
Thanks in advance for your reply!
HyungA potential workaround I would try is is use ByteBuffers
(T)

What would make a JVM memory size 1.9GB ?

This is on Solaris 2.6, JDK 1.2.2_05a, JDK1.2.2_07, possibly JDK 1.3 (it crashed).
WLS 5.1, SP8. With inline_instrs_jit=0.
This is the [heap] segment shown by /usr/proc/bin/pmap. This is native heap, it is
NOT the Java Heap.
I know it could be the Type 2 db drivers - but I doubt it.
With JDK1.3 we set -XX:MaxPermSize=128m - it crashes after an hour.
One part of the application creates its own threads for some parallel processing.
Is this a known
problem with the JVMs?
Any help is much appreciated.
Mike Reiche

What is the 'Break difference' that the debug JVM shows? Is that the Java Heap? Or
is memory in the C Heap that is wasted by fragmentation?
============== C Heap Report ========================
mmap space 300515328
Committed space 95690752
Allocated space 34049316
Break difference 66060288
Breakdown by type:
ClassSpace 15252128
JITCompiledStackMaps 5277188
StackMap 1892672
Dependency 1856760
utf8_space 1854838
untagged 1783520
basicBlocksState 1664992
utf8_table 1055903
Class 811520
JITPrestub 610480
NearClass 531360
CardObjectTable 386048
JavaStack 257024
CheckingDone 200367
SummaryCardTable 193024
name_loader_cache_entry 65976
ScratchRecord 65548
basic_block_t 50896
IntfMethodTable 48960
stringTableOverflowRecord 46480
BitVectorElem 32768
ObjectMap 30724
ClassName 28407
Clinit 18752
Table_mem 18628
LoaderConstraintsTableEntry 11668
JITInlineByteCode 1928
LoaderConstraintsTableLoaderEntry 520
stateVecBuf 237
=====================================================
Total GC time: 2987981 ms
- Mike
"[email protected]" Mike wrote:
>
>
Aslo - GC[1] are taking way long (Debug JVM) - I'm used to seeing them taking
500
ms with the regular JVM. With -ms32m -m256m - I wanted GC[1] to run often
because
that has helped with other memory problems in the past - it doesn't work
so hot here.
GC[1] in 5514 ms: (38Mb, 0% free) -> (38Mb, 69% free)
GC[1] in 6300 ms: (38Mb, 0% free) -> (38Mb, 65% free)
GC[1] in 7130 ms: (38Mb, 0% free) -> (38Mb, 64% free)
GC[1] in 6158 ms: (38Mb, 2% free) -> (38Mb, 62% free)
GC[1] in 6171 ms: (38Mb, 0% free) -> (38Mb, 65% free)
GC[1] in 6885 ms: (38Mb, 0% free) -> (38Mb, 64% free)
GC[1] in 7403 ms: (38Mb, 0% free) -> (38Mb, 61% free)
GC[1] in 689101:25:49 PM PST {218} - Evaluation is: true
GC[1] in 6545 ms: (38Mb, 1% free) -> (38Mb, 61% free)
GC[1] in 7459 ms: (38Mb, 0% free) -> (38Mb, 62% free)
GC[1] in 6861 ms: (38Mb, 2% free) -> (38Mb, 58% free)
GC[1] in 6090 ms: (38Mb, 0% free) -> (38Mb, 56% free)
GC[1] in 6413 ms: (38Mb, 0% free) -> (38Mb, 60% free)
GC[1] in 8230 ms: (38Mb, 1% free) -> (38Mb, 58% free)
GC[1] in 7649 ms: (38Mb, 0% free) -> (38Mb, 54% free)
GC[1] in 7912 ms: (38Mb, 0% free) -> (38Mb, 55% free)
GC[1] in 7696 ms: (38Mb, 1% free) -> (38Mb, 57% free)
GC[1] in 6543 ms: (38Mb, 1% free) -> (38Mb, 60% free)
GC[1] in 7036 ms: (38Mb, 1% free) -> (38Mb, 59% free)
GC[1] in 7483 ms: (38Mb, 0% free) -> (38Mb, 56% free)
GC[1] in 5132 ms: (38Mb, 1% free) -> (38Mb, 59% free)
GC[1] in 8186 ms: (38Mb, 0% free) -> (38Mb, 53% free)
GC[1] in 5691 ms: (38Mb, 0% free) -> (38Mb, 58% free)
GC[1]01:35:49 PM PST {575} - Evaluation is: true
GC[1] in 8176 ms: (38Mb, 0% free) -> (38Mb, 46% free)
GC[1] in 8463 ms: (38Mb, 0% free) -> (38Mb, 47% free)
GC[1] in 7342 ms: (38Mb, 0% free) -> (42Mb, 41% free)
GC[1] in 6920 ms: (42Mb, 0% free) -> (49Mb, 41% free)
GC[1] in 8610 ms: (49Mb, 1% free) -> (60Mb, 40% free)
GC[1] in 9581 ms: (60Mb, 1% free) -> (60Mb, 50% free)
GC[1] in 10514 ms: (60Mb, 0% free) -> (60Mb, 59% free)
GC[1] in 9865 ms: (60Mb, 0% free) -> (60Mb, 60% free)
GC[1] in 11323 ms: (60Mb, 0% free) -> (60Mb, 57% free)
GC[1] in 18768 ms: (60Mb, 0% free) -> (60Mb, 60% free)
GC[1] in 11147 ms: (60Mb, 0% free) -> (60Mb, 55% free)
GC[1] in 7293 ms: (60Mb, 0% free) -> (60Mb, 42% free)
GC[1] in 9372 ms: (60Mb, 0% free) -> (60Mb, 53% free)
GC[1] in 8814 ms: (60Mb, 0% free) -> (60Mb, 55% free)
GC[1] in 9695 ms: (60Mb, 1% free) -> (60Mb, 54% free)
GC[1] in 7309 ms: (60Mb, 0% free) -> (60Mb, 53% free)
GC[1] in 8713 ms: (60Mb, 0% free) -> (60Mb, 54% free)
GC[1] in 11955 ms: (60Mb, 0% free) -> (60Mb, 55% free)
GC[1] in 12685 ms: (60Mb, 1% free) -> (60Mb, 55% free)
GC[1] in 18906 ms: (60Mb, 0% free) -> (60Mb, 58% free)
GC[1] in 13333 ms: (60Mb, 0% free) -> (60Mb, 51% free)
"[email protected]" <[email protected]> wrote:
Rob -
Thanks for your attention -
We create lots of threads - up to five threads for each DB hit (i didn't
design it).
The multi-threading will be disabled/removed and tested later on today.
Both 'top'
and pstack show around 85 threads.
I've read articles on the bea newsgroups about WL hanging on to threadreferences
so that the threads could not be GC'ed, but it sounded more like a customer's
impression
of what might be going on than something from BEA engineering.
Right now we are running with the 1.2.2_05a 'Debug' JVM with -verbose:gc
-verbose:gc
-verbose:gc
JVMARGS=verbose_c_heap,inline_instrs_jit=0
Unfortunately, some of the code being tested is now broken and not being
excercised
today. I will keep you posted.
- Mike
Rob Woollen <[email protected]> wrote:
How many threads are you creating?
Each thread uses some memory (stack etc.), but 1.9GB would be a lot of
thread creation.
-- Rob
Mike Reiche wrote:
This is on Solaris 2.6, JDK 1.2.2_05a, JDK1.2.2_07, possibly JDK 1.3
(it
crashed).
WLS 5.1, SP8. With inline_instrs_jit=0.
This is the [heap] segment shown by /usr/proc/bin/pmap. This is nativeheap, it is
NOT the Java Heap.
I know it could be the Type 2 db drivers - but I doubt it.
With JDK1.3 we set -XX:MaxPermSize=128m - it crashes after an hour.
One part of the application creates its own threads for some parallelprocessing.
Is this a known
problem with the JVMs?
Any help is much appreciated.
Mike Reiche--
Coming Soon: Building J2EE Applications & BEA WebLogic Server
by Michael Girdley, Rob Woollen, and Sandra Emerson
http://learnweblogic.com

Is it possible to change memory size while runtime?

Hi!
Is it possible to set the Xmx value while runtime?
I try to do something like this java Myclass -Xmx128mBut only in a dynamically way while my application is running.
I'm developing an image-rendering - extension for an existing app and there's no chance to edit thejava XYZ statement.
I don't think that's possible, but If anyone has an idea....
Thanks!

Yes. Both RAM and the hard drive are easily accessible and replaceable. The warranty is not voided because both are considered DIY. However, if you damage the computer in the process then your warranty will not cover that damage. But it is not voided.

Increasing user's JVM size at runtime, applet

hi guys
i need to increase the user's JVM heap size at runtime in my applet. dont worry this is an internal work thing so security issues with modifying JVM need not be considered.
what is the best way to achieve this? as soon as the applet is opened i want the JVM heap to increase and then continue with my processing.
thanks in advance!

i need to increase the user's JVM heap size at
runtime in my applet.
as soon as the
applet is opened i want the JVM heap to increase and
then continue with my processing.You seem to be aware that this can be done statically using the
Java control panel. Your applet or any kind of Java application cannot
do this after it has been started. If you tell us why you want to do this
and why the static solution isn't good, perhaps someone can
propose a better way of achieving your goals.

Increase the memory

Hi,
how to increase the memory size of a jvm.
could u plz. help me.
regards
AMJ

command line arg -Xms128m to get 128 megs

Increasing JVM memory size at runtime

Similar Messages

Maybe you are looking for