JV / JAVA / JVM

JVM Startup Generator.

Build straightforward Java 21 or 25 startup commands with validated heap allocation and workload-specific arguments.

Configure startup

WorkloadInstalled Java versionInitial heap (MiB)Maximum heap (MiB)JAR file in working directory

Add explicit G1 garbage collector flag

GENERATED COMMAND

java -Xms1024M -Xmx4096M -XX:+UseG1GC -jar server.jar nogui

Targets Java 25; install this Java version on the host and verify with java -version.
Allocate 4096 MiB heap at maximum. Leave headroom for the OS, native memory and other services.
This is a starter command, not an automatic performance optimisation.

Minecraft server runtime with nogui. Actual memory and CPU needs depend on your workload.