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Just faced with strange issue. When i type
java -version i got
Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. .
java -Xms64m -Xmx64m -version This command works fine
java version "1.6.0_24" Java(TM) SE Runtime Environment (build 1.6.0_24-b07) Java HotSpot(TM) Client VM (build 19.1-b02, mixed mode) If i change xms, xmx to 128m, i get error again.
Using top command and free -m i can see, that i got over 192 mb free, so why i still get this error ?
Mem: 262144k total, 64760k used, 197384k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached Thank you
895
OutOfMemoryError: Java heap space. 1) An easy way to solve OutOfMemoryError in java is to increase the maximum heap size by using JVM options "-Xmx512M", this will immediately solve your OutOfMemoryError.
Max Heap Size. The maximum theoretical heap limit for the 32-bit and 64-bit JVM is easy to determine by looking at the available memory space, 2^32 (4 GB) for 32-bit JVM and 2^64 (16 Exabytes) for 64-bit JVM. In practice, due to various constraints, the limit can be much lower and varies given the operating system.
The max JVM heap size limit has been removed since we moved to completely 64 bit releases. As such you are now limited by the OS and/or machine. The theoretical limit is 2^64 bytes, which is 16 exabytes (1 exabyte = 1024 petabytes, 1 petabyte = 1024 terabytes). However, most OS's can't handle that.
I had the same problem when using a 32 bit version of java in a 64 bit environment. When using 64 java in a 64 OS it was ok.
93
It looks like the machine you're trying to run this on has only 256 MB memory.
Maybe the JVM tries to allocate a large, contiguous block of 64 MB memory. The 192 MB that you have free might be fragmented into smaller pieces, so that there is no contiguous block of 64 MB free to allocate.
Try starting your Java program with a smaller heap size, for example:
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