In short, if you allocate too little RAM the collector runs too often and if you allocate too much RAM, the collector idles for too long and then runs too hard all at once.īoth are bad for performance so you should aim to increase the RAM allocation for your Minecraft server in modest increments, say from 1GB to 1.5GB to 2GB, until you achieve the results you want. In our discussion of how much RAM is good for a Minecraft server, we touch on the concept of the Java “ garbage collector,” the built-in mechanism Java uses to manage RAM. On most systems, this will be far too wide a range (and far too high a maximum value) and it will impact performance. Java will default to setting a Minimum HeapSize (the least amount of memory it will use) to 1/64 the physical RAM reported by the operating system and the Maximum HeapSize (the most memory it will use) to 1/4 the available RAM. You might be curious what happens if you don’t set the memory allocation flags at all. Setting the minimum and maximum as the same value sets the heap size to a fixed value which helps avoid performance hits as Java dynamically adjusts the heap size. You may have noticed that we’re not specifying a range, like 512M to 2048M in our commands, but using the same value for the minimum and maximum heap size. Java -Xmx2048M -Xms2048M -jar server.jar nogui If we want to increase the RAM allocation to, say, 2GB, you can simply shut down the server and run it again with increased values: Here's a look at all console commands and cheats available in Minecraft most of them serve very niche purposes, but learning them all will make it easy to conquer your server. You can take the GUI flag off if you want a GUI window with performance stats, a player list, and a live view of the server log.
Minecraft server commands archive#
The -jar server.jar portion simply points Java’s jar archive tool at the server file, and the nogui flag stops the server from creating a GUI window. In the above command, we call on Java, we specify a starting heap size of 1024M and a maximum heap size of 1024M. Java -Xmx1024M -Xms1024M -jar server.jar nogui Let’s look at an example startup command and break down all the pieces.
You can use either megabyte or gigabyte designations like 1024M or 1G with the flags. You set the size of the heap, or memory allocation, with the flags -Xmx and -Xms which specify the maximum and initial heap size, respectively.
Minecraft server commands software#
Instead, RAM allocation is handled by command-line arguments passed along to the server software during startup.
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