Java heap size: error when setting it too large
The likely case is that while your operating system is 64-bit, your JVM is not. Opening a command line and typing java -version
will give you the verbose version information, which should indicate whether your installed JVM is a 32 or 64-bit build.
A 64-bit JVM should have no problem with the higher memory limits.
Yufei
Updated on June 04, 2022Comments
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Yufei almost 2 years
I have a program that fundamentally requires a lot of memory. However, for some reason java gives me an error when I try to set the max heap space above 1.5GB. That is, running
java -Xmx1582m [my program]
is okay, but
java -Xmx1583m [my program]
gives the error
Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine.
I got the same error in both Windows command line and Eclipse.
Here are my system configurations:
Windows 7 (64-bit)
Intel Core 2 Quad CPU
Installed RAM: 8.00 GB
Java version 1.6.0
It is weird that I can only set 1.5GB memory even though I'm running 64-bit OS with 8 GB RAM. Is there a way to work around this?