Could Not Reserve Enough Space for Object Heap to Start Jvm

Could not reserve enough space for object heap

Run the JVM with -XX:MaxHeapSize=512m (or any big number as you need) (or -Xmx512m for short)

Could not reserve enough space for object heap to start JVM

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:

java -Xms16m ...

Java: Could not reserve enough space for object heap error, despite enough memory

The JVM can't just pick any old memory anywhere for its object heap, it has to be contiguous; meaning a continuous, unfragmented block of free memory. While you theoretically might have enough raw memory free to launch a JVM with this heap size, if it's not contiguous then it's useless as far as the JVM is concerned.

Note that this is far, far more likely to happen with a 32 bit address space (if you're using a 32 bit OS or 32 bit JVM), but can of course still happen regardless.

Android Gradle Could not reserve enough space for object heap

For Android Studio 1.3 : (Method 1)

Step 1 : Open gradle.properties file in your Android Studio project.

Step 2 : Add this line at the end of the file

org.gradle.jvmargs=-XX\:MaxHeapSize\=256m -Xmx256m

Above methods seems to work but if in case it won't then do this (Method 2)

Step 1 : Start Android studio and close any open project (File > Close Project).

Step 2 : On Welcome window, Go to Configure > Settings.

Step 3 : Go to Build, Execution, Deployment > Compiler

Step 4 : Change Build process heap size (Mbytes) to 1024 and Additional build process to VM Options to -Xmx512m.

Step 5 : Close or Restart Android Studio.

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