Server is lagging like hell (high end)

I made a Server and since a few days it is lagging like hell. The first week it run perfectly and since y-day evening it lags. On the Server there are never more then 4 player but also alone it laggs. I have 2 gb Ram and a 100mbit connection and an i7. When i ping the Server it has a ping of 34! Also without any plugin it laggs.
Its a Debian Lenny Server.
What happened? And why does it lag so much? I tried a normal Server (no bukkit) and it worked perfeclty!

 

Try making a new world.

 

what bukkit build do you use and do you know any specs about the harddrives?
did you startup bukkit the recommended way?
I could imagine java memory issues or slow harddrives could be a reason.

NoMad

 

I dont want to lose the world, and its only a 14mb file.
Its the 860 built, i also updated every plugin.
And also the hard drives are fast enough.
"java memory issues" What do you mean?

edit: hwhen i shutdown the server it quite always happens that it stucks on "saving chunks" i waited one time at least 40 minutes, even on the new generated map! But if i type before i shutdown "save-all" ir works perfectly! Also quite fast (the saving in "save-all")

edit2: its not that it laggs always! Its like 1 minutes it works perfect, then 10 second lag. Then it works again 1minute fine and another lag. Always like this...

 

i've heared from some friends of mine, minecraft (itself, client) tends to crash and/or lag when no heap space limit is defined.
That's why the -Xmx parameter should be in your server startup file.
For me, it seems 1.6.6 is generally a bit more laggy in SMP. But not in a too annoying way.
I personally have a server hosted by nitrado, 10slot with bukkti 860 and some plugins (lockchest, essentials, permissions, myhome, mywarp), there is a >100MB Map with usually 4-6 players on it.
There is some lagging in gameplay, but i can live with it.

have you tried running a copy of your server (i think this one is a rootserver?) on your own pc and connecting locally? Or have you tried monitoring the system load?

NoMad

 

I have always at least 1,2gb Ram free and a 1,4% load avrange
i start it with a shell "java -Xincgc -Xmx1G -jar mc.jar"
On a Win7 it works fine :/

Can it be something with java?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

could be possible, but unlikely because vanilla runs lag-free...
Except a general workaroung (re-install java, run bukkit without ANY changes) i'm out of ideas.
Perhaps you may try a newer build (863 and up should be fine).

NoMad