Tuning Minecraft for OpenJ9

May 25, 2019

We have been running the OpenJ9 JVM at Mineteria since July 2018. Our own experience with OpenJ9 has led us to continually tweak our set up and ensure that our servers are not subjected to long garbage collection pauses. Our servers (which span long-lived lobbies, to a creative-like server with frequent chunk loading, to short-lived game servers), while likely not representative of all Minecraft servers, have been using these flags for many months and have virtually eliminated any issues with garbage collection pauses.