How to Allocate More RAM to Minecraft Server (2022)

Allocating more RAM to Minecraft is a relatively straightforward process and can yield massive benefits such as reducing lag and making for a smoother experience across the board. Allocating more RAM to dedicated online play is a little more complicated, however – have you ever wondered how to allocate more RAM to your Minecraft server?

If so, you’ve managed to navigate the maze that is setting up your own server in the first place. You’re all set with the latest version of Java, and after a lot of blood, sweat, tears and copy-pasting of computer commands from the officially endorsed Minecraft tutorial, you’ve finally given your fellow Minecraft survivalists a home of their own. Well, technically it’s a home of your own, but hey, your hospitality knows no bounds.

Or maybe you’re a little more experienced with this stuff and breezed through the whole process no problem.

Either way, you’ve got your server, you’ve got your pals, you’ve got plenty of time to put into joyous hours of multiplayer Minecraft. What you don’t have is quite enough RAM on the server to support the number of players you have queued up for entry and still offer a smooth experience.

Whether you’re a newcomer to the world of server hosting or a seasoned veteran, this handy step-by-step guide will tell you everything you need to know about allocating more RAM to your Minecraft server.

First Thing’s First

Before we get into the technical details of how to allocate more RAM to your Minecraft server, it’s really important you make sure you know what you’re actually trying to do.

(Video) How To Add More RAM To A Minecraft Server

It may sound silly, but messing around with RAM allocation blindly could potentially have some… undesirable effects, not just on your server but across your whole PC.

Therefore the very first thing we’ll want to do is check how much RAM we have available to work with.

If you’re working on a Windows PC, you can do this by clicking the start button, selecting Settings, and navigating to the bottom of the menu where you’ll find the ‘About’ option. Click it and you’ll be greeted by the screen below – this is where you’ll find your device’s RAM specifications, including how much RAM you have to spare. This interface may change between different versions of Windows, but the principle will remain the same.

How to Allocate More RAM to Minecraft Server (1)

If you’re on a Mac, it’s a similar story – just head to the Apple icon in the top right, select ‘About this Mac’, and navigate to the memory tab. This will tell you how much RAM you have installed and give you a breakdown of memory slots.

How to Allocate More RAM to Minecraft Server (2)

You can also use the Activity Monitor application to see a breakdown of how much memory individual processes are using on your computer, which may help you decide how much RAM you can afford to spare on your Minecraft server.

How to Allocate More RAM to Minecraft Server (3)

This information will inform the exact commands you use to allocate more RAM to your Minecraft server, so you don’t want to cut this corner!

(Video) How To Allocate More Ram To Your Minecraft Server (1.16)

Once you’ve established how much RAM you can afford to allocate to your server, you’ll need to return to your old friend cmd.exe (or the Command Prompt) if you’re a Windows user, or alternatively Terminal if you’re on a Mac.

Unless you use a Windows batch file (we’ll talk a bit about that later) or the Java shortcut, you’re probably fairly used to the process of launching your Minecraft server through system commands. If this is the case, your usual command interface will probably look something like this:

How to Allocate More RAM to Minecraft Server (4)

It’s that last bit of code:

java -jar [your server file name].jar

that ultimately launches your server, and it’s this bit of code you’ll need to play with to change how much RAM it is allocated.

Fortunately this is about as simple as it could be. All you need to do is add a few additional pieces of information when you’re launching your server. Easier said than done, but luckily for you we have the exact code you’ll need right here for you to copy into your Command Prompt/Terminal window:

(Video) How to Dedicate More Ram to minecraft Server and Set Up a Server ALL VERSIONS

java -Xmx[RAM in MB]M -Xms[RAM in MB]M -jar [your server file name].jar

1GB RAM Example: java -Xmx1024M -Xms1024M -jar [your server file name].jar

2GB RAM Example: java -Xmx2048M -Xms2048M -jar [your server file name].jar

You’ll notice all that’s changed is that we’ve added a few things in the middle of the original command. The next step is to substitute the [RAM in MB] parts with, as you may have guessed, the amount of RAM you want to allocate to your Minecraft server in megabytes.

In the example below, we’ve decided to allocated 1 GB of RAM to the server. In megabytes this is roughly 1024 MB, so that’s the figure we’ve gone with:

How to Allocate More RAM to Minecraft Server (5)

As this is actually now the input suggested by Minecraft on their server download page, you may be rolling your eyes at this guide telling you what you already know. Not a problem – to allocate more RAM than just 1 GB, simply adjust the numbers in the line to reflect how much GB you want to allow the server to use. Calculating what this is in MB is really easy – just multiply 1024 by the number of GB you want and use the resulting figure in the line.

(Video) How to add more ram to a Minecraft Server

As you can see from the example above, upon entering this command your server should launch as normal (well, not entirely as normal – if the extra RAM is having the desired effect you should be seeing a noticeable increase in the speed of the launch!) and you’ll be able to jump in to your Minecraft server with a little extra support from your machine.

How to Allocate More Ram To Minecraft Server in a Batch File

Now, as you know, using Command Prompt or Terminal to launch your server gets the job done, but it sure takes a minute.

So is there a way to make the whole process a little less… wordy?

Where there’s a will, there’s a way. On Windows it’s easy – all you need to do is put together a batch file comprising of the code we just explained. You don’t even need to go into Command Prompt to do this: all you need is the humble Windows Notepad. Simply type out the code as we’ve done below (remembering to replace the numbers for the amount of RAM you want to allocate and the server name with your own), and then save the file with whatever name you want and (this is the important bit), the extension .bat.

How to Allocate More RAM to Minecraft Server (6)

This extension probably won’t be shown under the drop-down ‘save as type’ menu, but that’s not a problem – if you include the extension Windows will recognize the text file as a batch.

How to Allocate More RAM to Minecraft Server (7)

Make sure you save this file in the folder where you keep your server – the batch will be useless in the wrong location.

(Video) How To Allocate More RAM to Minecraft 1.18 (Give More RAM to Minecraft 1.18!)

Once you’ve done this, simply go to your server folder, open up the batch file and the code will run automatically, launching your server, extra RAM and all.

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Because Terminal operates a little differently to the Command Prompt, it’s a bit more challenging to make a text file executable on a Mac – but it can be done. For details, see this support page:

We hope this guide has been of assistance in setting up a Minecraft server with the capacity you need. Good luck, and happy crafting!


How much RAM should I allocate to my minecraft server? ›

At least 1 GB of RAM allocated for the server to run ( -Xmn 128M -Xmx 1G ). If you are using Windows or a desktop-based Linux distribution, you should have at least 1 GB of additional physical RAM in the computer, so the graphics on the desktop don't become laggy.

How do you add RAM on a server? ›

How to Increase Your Server Memory
  1. Step 1: Determine the Current Size of the Computer's Memory. ...
  2. Step 2: Locate the Memory Modules in the Computer. ...
  3. Step 3: Plan Your Upgrade. ...
  4. Step 4: Obtain the New Memory Modules. ...
  5. Step 5: Install the New Memory Modules. ...
  6. Step 6: Test for Proper Operation. ...
  7. Step 7: Possible Problems.
31 Mar 2008

Is 16 GB of RAM good for a Minecraft server? ›

If you look at professional Minecraft hosting plans, there's a base of 2GB of RAM for minimal worlds with ten plugins and ten players. The largest world that can support more than 50 mods, 150 players, and 150 GB in size require at least 15 GB of RAM.

Is 1.5 GB enough for Minecraft server? ›

You need how much RAM it takes for a smooth player experience. For most players goofing around with a few friends, 1GB of RAM for their Minecraft server is more than sufficient—especially if they optimize their server experience.

How much RAM should I allocate to Minecraft If I have 16 gigs? ›

Even 4gb should be enough. Minecraft uses cpu and ram a lot. So, even if you allocated 12gb it wouldn't be faster than 6gb allocated.

How much RAM should a modded Minecraft server have? ›

2GB – A fantastic plan if you are also planning to add some base plugins or mods and increase your player base on your server. 3GB – Use this plan if you are planning to install medium-sized modpacks or plugin packs. This is suggested for up to 25 mods or plugins. 4GB – This plan includes most modpacks.

How do I allocate more RAM to bedrock server? ›

Open the launcher: Edit > More Options on your install to adjust RAM settings. Change the existing Xmx2G to a different value, such as Xmx4G, to change allocated RAM. There is no way to allocate more RAM to Bedrock.

How much RAM should I allocate to Minecraft If I have 16 gigs? ›

Even 4gb should be enough. Minecraft uses cpu and ram a lot. So, even if you allocated 12gb it wouldn't be faster than 6gb allocated.

How much RAM should I allocate to Minecraft if I have 4 gigs? ›

How many GB RAM do I need to allocate to Minecraft if I had 4GB RAM? At minimum 2 but 4 is recommended, that means you can't play minecraft(at decent framerate) with your specs.

How much RAM does my server need? ›

In terms of size, for high-end workstations 16GB minimum is probably best, whereas for more budget friendly home set ups, 8GB should about do. Looking at servers, 16GB and 32GB are common capacities of server memory, although they can support up to 6TB for 2933 MT/s DDR4.

How much RAM do I need for all the mods 6? ›

All the Mods 6 - ATM6 Memory Requirements & Player Slots

To avoid lag or memory errors, order a minimum of 8GB of memory. If you are playing with friends or planning on hosting a public server consider ordering 9GB or more.


1. How To Allocate More Ram To Minecraft (Guide) | Add More Ram To Minecraft
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