A lag problem that just won't go away.

[newborn1000]

Launcher/pack Version:2.1.1

Operating System:(NFO Servers Environment)

Version of Java:(NFO Servers Environment)

Description of Problem:

ok, so here's the problem i'm experiencing. I run the server and for the first 8-12 hours its ok, then the server starts spouting Warning can't keep up messages and a lag starts occurring that gets worse and worse as time goes on. It should be noted i am running a 1.5gb server which can serve up to 30 people, i am currently only serving about 5 at peak times as we have yet to complete development of the server. this lag still occurs with 0 players online. i have tried leaving it for a few hours to see if it phases out and nothing changed.

i'm suspecting a memory leak of some description here. here is a list of the mods i'm running:

worldborder, plugman, minequery, worldedit, entitysuppressor, autosave, buycraft, commandbook, vanishnopacket, nospeedkick, condenserpipefix, vault, permissionsex, logblock, questioner, worldguard, quicksign, iconomy, realmotd, bkcommonlib, openinv, chestshop, modifyworld, herochat, securechest, mcmmo (as modded on tekkit forums), nolaggchunks, deathtpplus, nolagg, factions

i have attached a nolagg examine report to the post, this was taken during a lag period:

https://www.dropbox.com/s/vsaoaevtwu10u74/2012_05_56-9_30_56.exam

things i've tried:

i've removed several plugins, noticed a trend in the examine reports that plugin lag spikes where due to chunk unloading events, so i looked at chunk loaders, disabled them, no change, so i 1/2'ed buildcraft's update rate also no change.

Error Messages:

2012-05-12 04:15:54 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?

(repeated)

[DragnHntr]

Try "/remove items -1" in-game.

[newborn1000]

tried this with 10000000 and it only have 3 entities to remove

[bastrian]

We had this kind of problems too. The only solution was for us to remove Java memory limits and deny/disable chunk loading blocks. After we removed the Wireless redstone mod the lag was gone Completly.