Yeah, don't do that. Run SpigotMC under Java 8 with the following flags: -d64 (force a 64-bit data model, although usually this isn't necessary) -server (use

Yeah, don't do that. Run SpigotMC under Java 8 with the following flags: -d64 (force a 64-bit data model, although usually this isn't necessary) -server (use the server-optimized JVM instead of the desktop-optimized one, again, may not be necessary) -Xmx1G (start with this heap memory limit and increase if necessary) -XX:+UseConcMarkSweepGC (for multithreaded GC) -XX:+CMSIncrementalMode (only use on computers that support 1 or 2 hardware threads) -XX:+AggressiveOpts (enables additional JVM optimizations) There's a ton of bad advice out there when it comes to JVM configuration and Minecraft. The above comes from my understanding of this somewhat dated Java GC tuning guide (http://www.oracle.com/technetwork/java/gc-tuning-6-140523.html http://www.oracle.com/technetwork/java/gc-tuning-6-140523.ht...) and sk89q's excellent Minecraft server tuning guide (http://www.sk89q.com/2013/03/improving-your-minecraft-servers-performance/ http://www.sk89q.com/2013/03/improving-your-minecraft-server...), coupled with small-scale server profiling on my part.