If you have and use more than 12GB of memory, adjust the following: If you are using an Xmx value greater than 12G If you are running with 12GB or less memory for MC, you should not adjust these parameters. I recommend using at least 6-10GB, No matter how few players! If you can’t afford 10GB of memory, give as much as you can, but ensure you leave the operating system some memory too. Paper is the only way to run a 1.15 server with decent performance! /r/admincraft post on “Why you should switch to Paper” for much more details.Paper is a drop in replacement for Spigot that every Bukkit/Spigot plugin should work the same for. It also comes with bug and exploit fixes, many new features, and a ton of new API for developers to use and have a better plugin experience. If you are not already using Paper, the extremely improved version of Spigot, you really need to switch! Paper is a much faster version of Spigot, with massive performance improvements. These flags work and scale accordingly to any size of memory, even 500MB but 1.15 will not do well with such low memory…) Use these flags exactly, only changing Xmx and Xms. The JVM Startup Flags to use – MC 1.15 (Java 8+, MC 1.8+) Update If these flags help your server, consider donating! CPU may be slightly higher, but your server will be overall more reliable and stable TPS. I strongly suggest using these flags to start your server. These flags help keep your server running CONSISTENT without any large garbage collection spikes. These flags are the result of a ton of effort, and results of seeing it in production on various server sizes, plugin lists and server types. I then announced my research to the public, and to this day, many servers have been using my flag recommendations for years and reporting great improvement to garbage collection behavior. I tested these on my server, and have been used for years. Jin Java, Minecraft, System Administration IntroductionĪfter many weeks of studying the JVM, Flags, and testing various combinations, I came up with a highly tuned set of Garbage Collection flags for Minecraft.
Tuning the JVM – G1GC Garbage Collector Flags for Minecraft
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