I recently got much faster internet at my house, and a few friends of mine wanted to play minecraft, so I converted my desktop into a server.
Windows 7 64 bit
8gb ram
Phenom II x4 955 BE processor (4 cores @ 3.2ghz)
For the first week or so the server ran totally fine with up to 4 players at once, the only person who ever got lag got lag in single player, so presumably their computer is just slow. Sometimes I run the client on the same computer as the server software, this didn't cause any lag unless I was also streaming Netflix and running the computer out of memory.
Then, sunday night, the server started saying:
[WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?
Once per minute, every single minute. It was happening every 55-65 seconds, with very little varience. I tried rebooting the server, problem came back as soon as the server was launched again. I have tried using /tps when this happens but I always get 20 +/- 0.2, but sometimes if i type it right when the lag starts it takes a few seconds to register so it might be missing the lag spike. I am not sure how to further diagnose the problem but if any other server commands would be helpful I can run them and post results.
Every time one of these lag spikes hit, all clients experience blocks they broke coming back, enemies freezing and then teleporting, but framerate doesnt seem to be affected on anyone including the client running locally. In addition, these lag spikes are hitting even when nobody is online (we do have a couple of chunk loaders)
Can anybody help us fix this problem?
Windows 7 64 bit
8gb ram
Phenom II x4 955 BE processor (4 cores @ 3.2ghz)
For the first week or so the server ran totally fine with up to 4 players at once, the only person who ever got lag got lag in single player, so presumably their computer is just slow. Sometimes I run the client on the same computer as the server software, this didn't cause any lag unless I was also streaming Netflix and running the computer out of memory.
Then, sunday night, the server started saying:
[WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?
Once per minute, every single minute. It was happening every 55-65 seconds, with very little varience. I tried rebooting the server, problem came back as soon as the server was launched again. I have tried using /tps when this happens but I always get 20 +/- 0.2, but sometimes if i type it right when the lag starts it takes a few seconds to register so it might be missing the lag spike. I am not sure how to further diagnose the problem but if any other server commands would be helpful I can run them and post results.
Every time one of these lag spikes hit, all clients experience blocks they broke coming back, enemies freezing and then teleporting, but framerate doesnt seem to be affected on anyone including the client running locally. In addition, these lag spikes are hitting even when nobody is online (we do have a couple of chunk loaders)
Can anybody help us fix this problem?