I am running from time to time in eclipse tasks that require very big amount of memory. So jvm while task is running swallows about 2-3gb of RAM, that is ok. But once jvm took that memory it ...

What is the difference between -XX:+UseParallelGC and -XX:-UseParallelGC? Most links indicate the first, but http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html mentions th...

Possible Duplicate: JVM Options List - still being maintained post Oracle? Is there a page anywhere with a definitive complete list of the command line options available to run a JVM? E...

I'm running a memory intensive app on a machine with 16Gb of RAM, and an 8-core processor, and Java 1.6 all running on CentOS release 5.2 (Final). Exact JVM details are: java version "1.6.0_10" Ja...

I am looking for the appropriate settings to configure the JVM for a web application. I have read about old/young/perm generation, but I have trouble using those parameters at best for this configu...

Basically we've noticed that on some computers setting the JVM option -Xmx (max heap size) sometimes cause the JVM to fail to initialize, even if there's more than adequate RAM on the system. So ...

What are the default values for the following options in Java 6 on a non-server-class machine? -Xmx -XX:MaxPermSize Oracle's documentation states that: On server-class machines running the s...

I am wrestling with large memory requirements for a java app. In order to address more memory I have switch to a 64 bit JVM and am using a large xmx. However, when the xmx is above 2GB the app see...

I've developed a Java console application that when start, open a console window and remain in foreground, i want to start that application in background . Now i launch the application by this com...

I need to pass a couple of JVM arguments to the JVM which Tomcat is running in so that my application can pick them up. I want to follow the process outlined in this article to pick up environment...

This question is similar to: jsf: integer property binded to a inputtext in UI is set to zero on submit but I am not completely satisfied with the solution. The contexts is the same: I have a web...

I want to specify vm args of -Djava.library.path=./src/main/resources so that a dll is picked up automatically, and I want to specify this in maven, so other developers don't have to manually confi...

I have a program that sometimes throw OOME, I understand that there is a flag in the JVM options that I can set and whenever a certain Error/Exception appears (such as OOME) it calls a script I wr...

I've kind of asked this question before - What does JVM flag CMSClassUnloadingEnabled actually do?, but this time it's slightly different! If I start a Java VM with the -XX:+CMSPermGenSweepingEnabl...

I am looking at the JVM configuration options for running Alfresco, mainly this document on the Alfresco Wiki. One of the recommendations is to use the JVM flags -Xcomp and -Xbatch. The justificati...

Lot of Mobile devices are coming with JVM with its OS(for example Nokia,sony ericcson).will all devices have same JVM? are all JVMs owned by sun micro systems? has device manufacturer paid for it t...

Normally to attach a debuger to a running jvm you would need start the jvm with arguments such as the following: > java -Xdebug -Xrunjdwp:transport=dt_socket,address=1000,server=y,suspend=n N...

Possible Duplicate: Real differences between “java -server” and “java -client”? I've seen the argument "-server" used as a command line argument for java.exe: ...

Is it possible to create a JVM from within a JNI method using the JNI API? I've tried to do this using the JNI function "JNI_CreateJavaVM()", but it's not working (the function keeps returning a v...

Will the use of -classpath option with java add to or replace the contents of the CLASSPATH environment variable?

I am debugging a memory leak in an application running on Sun's JDK 1.4.2_18. It appears that this version supports the command line param -XX:+HeapDumpOnCtrlBreak which supposedly causes the JVM t...

I'm trying to change default firstDayOfWeek for java.util.Calendar from SUNDAY to MONDAY. Is it possible to achieve this through JVM configuration instead of adding this piece of code? cal.setFirs...