Unrecognized VM option ‘UseParNewGC’ , Error: Could not create the Java Virtual Machine
As a follow up to Peter’s answer the flag is as described at Oracle
jvm
Eclipse error: ‘Failed to create the Java Virtual Machine’
Try removing the -vm P:\Programs\jdk1.6\bin lines. Also, a general recommendation: set -Dosgi.requiredJavaVersion=1.6, not 1.5.
Invalid maximum heap size
You are using 32 bit VM (Java HotSpot(TM) Client VM) which can be mapped to maximum 4G (Only 2 GB in reality) 2^32 address locations Maximum Java heap size of a 32-bit JVM on a 64-bit OS Error message suggest you are using 5GB heap memory which is not supported on 32 bit architecture Invalid maximum … Read more
Differences between “java -cp” and “java -jar”?
I prefer the first version to start a java application just because it has less pitfalls (“welcome to classpath hell”). The second one requires an executable jar file and the classpath for that application has to be defined inside the jar’s manifest (all other classpath declaration will be silently ignored…). So with the second version … Read more
How exactly does the Java interpreter or any interpreter work?
I have been figuring out the exact working of an interpreter, have googled around and have come up with some conclusion, just wanted it to be rectified by someone who can give me a better understanding of the working of interpreter. So what i have understood is: An interpreter is a software program that converts … Read more
Java Could not reserve enough space for object heap error
I have Java7 running on 32-bit Windows and 4 GB RAM, but: …still does not work. Error: Error occurred during initialization of VMCould not reserve enough space for object heapError: Could not create the Java Virtual Machine.Error: A fatal exception has occurred. Program will exit. java -Xmx1G -Xms1G -jar Minecraft.jar is working. Why?
Is there any advantage in setting Xms and Xmx to the same value?
Well there are couple of things. Program will start with -Xms value and if the value is lesser it will eventually force GC to occur more frequently Once the program reaches -Xms heap, jvm request OS for additional memory and eventually grabs -Xmx that requires additional time leading to performance issue, you might as well … Read more
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
Ultimately you always have a finite max of heap to use no matter what platform you are running on. In Windows 32 bit this is around 2GB (not specifically heap but total amount of memory per process). It just happens that Java chooses to make the default smaller (presumably so that the programmer can’t create … Read more
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
Ultimately you always have a finite max of heap to use no matter what platform you are running on. In Windows 32 bit this is around 2GB (not specifically heap but total amount of memory per process). It just happens that Java chooses to make the default smaller (presumably so that the programmer can’t create … Read more