java- SDK version and Vm options

Asked Dec 07 '18 at 02:34

Active Dec 07 '18 at 02:34

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I am running a program on Intellij and my project SDK is currently set to version 1.7.

I tried to change the VM options to a -Xmx10g and it throws an error claiming Invalid Heap Space, JVM could not create

So I tried changing the JDK to version 1.8 which is the latest and it doesn't throw any error at all and works fine.

Does anyone know why?

asked Dec 07 '18 at 02:34

Daredevil

If you do not specify -Xms, heap starts at default initial value and grows to a maximum of 10GB. Do your PC have 10GB available memory? – Miller Cy Chan Dec 07 '18 at 04:19
Yea but i have to specify this much because otherwise it would throw out of memory GC overhead exceeded. What should i specify -Xms with? – Daredevil Dec 07 '18 at 04:20
You may try -Xms512m -Xmx4g first – Miller Cy Chan Dec 07 '18 at 04:22
Please refer to https://stackoverflow.com/questions/1434779/maximum-java-heap-size-of-a-32-bit-jvm-on-a-64-bit-os – Miller Cy Chan Dec 07 '18 at 04:25
4g is not enough, it runs halfway and throws OOM – Daredevil Dec 07 '18 at 04:42

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