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just a heads up... this right here solved all of my problems lol http://forums.bukkit.org/threads/server ... post-23894
it restarts my server every 4 hours and performs a save-all every 15 minutes which unloads unused terrain chunks from the server and frees up memory (i actually get messages in the console now saying how much memory is released every time), and the automatic restarts which take literally 3 seconds keep the server in tip-top shape. It also restarts a crashed server. It really makes it launch and forget. Definitely a must for anyone experiencing these kinds of issues
In Linux, you can see the CPU type and speed with:
cat /proc/cpuinfo
Pretty much any clock speed of the latest generation of processor beats any clock speed of older generations, so be careful if you're looking at just the number, as it can be misleading. We use only Nehalem+ processors here, and they're crazy fast .
Minecraft is fairly unpredictable when it comes to CPU, but explosions classically use a lot of it, as does loading/creating new world chunks. Aggressive garbage collection (as some of these optimizations do) might also lead to higher-than-normal usage.
I don't have enough experience with Minecraft personally to know exactly what's normal, but I do know that Minecraft is very piggy with memory, and when it doesn't have enough memory, it has to use a lot more CPU power. I would think that 2500 MB would be enough, but there might be something else going on, as well, such as an issue with an add-on or abusive user.
another upgrade, and now it performs even worse at the new location. No matter how much ram i throw at it, it still lags, and ram doesnt even go past 50% usage anymore after hours running. I read somewhere that customized kernels are sometimes configured in a way that interferes with minecraft, could this be the case? Or maybe slow I/O speeds? Last i checked i was getting like 35 mb/s
You are welcome to try any custom kernel that you would like, or a different version of Java -- on an unmanaged VDS, the sky's the limit for software options .
35 MB/sec with small files would be a very good speed of I/O, but you could always factor that out by using a ramdisk.
