criticalJava ErrorsAffects: All versions
How to Fix OutOfMemoryError: GC Overhead Limit Exceeded
Fix GC overhead limit exceeded in Minecraft by increasing heap size, switching to G1GC, and removing memory-leaking mods.
Quick Fix
Increase heap size with -Xmx6G and add -XX:+UseG1GC to use the G1 garbage collector.
Error Message
java.lang.OutOfMemoryError: GC overhead limit exceededHow to Fix
1
Increase JVM heap size: -Xmx6G -Xms4G
2
Switch to G1GC: -XX:+UseG1GC -XX:MaxGCPauseMillis=50
3
Remove recently added mods or plugins that may cause leaks
4
Delete the region files for corrupted chunks
5
Reduce entity count and loaded chunks
Common Causes
- Java spending over 98% of time doing garbage collection
- Severe memory leak in mod or plugin
- Heap space too small for the workload
- Corrupted world data causing infinite processing loops
Diagnostic Steps
- Check memory usage in F3 screen or server console
- Review recent mod/plugin additions
- Test with a fresh world to see if the issue is world-specific
- Use a profiler like Spark to identify memory leaks
FAQ
What does GC overhead limit exceeded mean?
Java is spending almost all its processing time trying to free memory instead of running the game. The JVM needs more heap space.