Optimize Hytale Server RAM, Java 25 and View Distance

Verify Java and the official launcher

Use a 64-bit Java 25 runtime for x64 or arm64. The manual recommends Adoptium. Verify the binary used by the service:

java --version

It must report Java 25. With several Java installs, an interactive shell may be correct while the panel or service starts an older binary, so inspect the script path.

Hytale ships a trained AOT cache to reduce startup warm-up:

java -XX:AOTCache=HytaleServer.aot -jar HytaleServer.jar --assets Assets.zip

Keep the JAR, HytaleServer.aot and Assets.zip from one release. Replace an old cache with the new release's file rather than reusing it blindly.

Set -Xmx without starving the host

With official wrapper scripts, put JVM arguments in jvm.options, one per line:

-Xms2G
-Xmx4G
-XX:+UseG1GC

This shows the format, not a universal allocation. -Xmx caps Java heap; leave memory for the OS, native buffers, cache and backups. The manual notes that required memory is hard to infer from allocation alone and that pressure often appears as extra CPU time spent in garbage collection.

Do not automatically set -Xms equal to -Xmx, or paste a long “magic flags” list created for another Java version. Start simple, observe and change one variable per test.

Limit view distance

The Hytale manual calls view distance the main RAM driver and recommends a maximum of 12 chunks, or 384 blocks. This is already broad; Hypixel's comparison notes that it covers roughly the block radius of 24 Minecraft chunks.

Validate an optimisation

For deeper observability, the manual references an Apex Prometheus exporter and Nitrado PerformanceSaver plugin. Check versions and permissions before installing. The Hytale server setup guide covers Java, assets and first launch.

Frequently asked questions