Out of memory

OutOfMemoryError: Java heap space

What the log looks like

java\.lang\.outofmemoryerror: *java heap space
out of memory[^\n]{0,40}heap

How to fix it

  1. Raise the allocated memory in your launcher (-Xmx)
  2. Do not give Minecraft more than about half your physical RAM
  3. A modpack that needs more than 8 GB usually has one mod leaking, not a RAM problem
SeverityStops the game
CategoryOut of memory

Check your own log

Related errors

Out of memoryCould not reserve enough space for object heapYou asked for more memory than the machine can giveOut of memoryMinecraft Crash: java.lang.OutOfMemoryError (Heap or Native Memory Exhausted)Increase your allocated Java memory (`-Xmx`) in your launcher's instance settings or your server's `run.bat`/`Out of memoryOutOfMemoryError: MetaspaceMetaspace holds class definitions, not world data — raising -Xmx does nothingOut of memoryjava.lang.OutOfMemoryError: Failed to allocate bytes (Off-Heap Rendering Memory)Update Iris Shaders, Sodium, and visual entity mods (such as Illuminations) to the latest builds available forOut of memoryjava.lang.OutOfMemoryError: GC overhead limit exceededCheck the 'Memory:' and 'JVM Flags:' lines under System Details in your crash report to see your current RAM cOut of memoryjava.lang.OutOfMemoryError: null (LWJGL Native Memory Exhausted)Lower—do not increase—the RAM allocated to Minecraft in your launcher (for example, 4 GB to 6 GB on a 16 GB PC