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What is the minimum RAM needed for an Minecraft server? (without using custom servers) There will be at most 5 players, the VPS will be OpenVZ.

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4 Answers 4

up vote 5 down vote accepted

Tip: If you want to spare more memory, you may set the -Xms parameter even lower, say:

java -Xms32M -Xmx512M -jar minecraft_server.jar nogui

The parameter controls how much memory is reserved on startup. Your server will start with 32MB RAM and whenever it needs more memory it will allocate some until it reaches the maximum of 512M. However, this will result in a little slowdown whenever the allocation is done.

Source: http://www.minecraftwiki.net/wiki/Tutorials/Setting_up_a_server#Less_than_1GB_free_RAM

Also you can check this website : http://www.canihostaminecraftserver.com/

With this you can have a small idea on how many players you can handle :D

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If I remember correctly it's about 10 MB per expected user. However, it is also assuming that the players will stay somewhat close together, if everyone spreads out then you'll need a signifigantly higher amount of ram.

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I have 2 to 12 players, about 5 low-memory plugins (Lift, Dynmap (uses more mem I think), Spawn, Nicknamer,..). The server has 16 GB Ram and I allocated 4 GB to minecraft.

Right now minecraft uses 1.5 to 3 GB.

I don't understand how someone saying 10MB per player. You need way more. I'd suggest 1 GB per 8 players at least.

I don't think I can host 100 player with my 16 GB.

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FWIW I ended up playing Vanilla (5 players) with 256MB RAM allocated to Minecraft, and it worked very well –  Bogdacutu Dec 12 '13 at 20:59
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I have a VPS that have a 125MB ram and 256MB Swap I allocated 150M ram into the server, but It runs perfectly normal with ALOT of plugins include orebfucastor,essentials, group manger, spark tail, ETC.It will just pop up the message cant keep up, but it runs normally............

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125MB isn't enough to run Windows, let alone anything on top of that. –  Frank May 1 at 3:34
    
@Frank probably a barebones Linux distro. –  kotekzot May 1 at 3:59
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