[RB 1060] lag on player join

hey

everytime when a player joines all players get a big lag.
each time a player joins the server, the utilization of the java/craftbukkit process goes to 0% and jumping after the login for a small time to 100%

my startparameters:

Code:

-Xmx2048M -Xms2048M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts

CPU: AMD 64 X2 7750+ (2,7 GHz)
RAM: 4096 MB
HDD: 250 GB SATA II (7200rpm)
OS: Debian 64Bit
Bukkit Build: 1060
Java:

Code:

java version "1.7.0_02-ea"
Java(TM) SE Runtime Environment (build 1.7.0_02-ea-b07)
Java HotSpot(TM) 64-Bit Server VM (build 22.0-b04, mixed mode)

 

What version of mc are you using?
If its not 1.7.3 then you can't use [1060]

 

our server still on rb 1060 for 1.7.3 and our players use the 1.7.3 client

 

What plugins are you using?

Some plugins cause lag on join.

 

AuthMe.jar
NoExplode.jar
OpenInv.jar
BorderGuard.jar
Permissions.jar
BukkitContrib.jar
PlgWarp_op.jar
ChestShop.jar
ChunkRegenerate.jar
SpawnControl.jar
CommandBook.jar
Towny.jar
LWC.jar
WoolSwitch.jar
LogBlock.jar
dynmap.jar
MCDocs.jar
iChat.jar
Minequery.jar
iConomy
iConomy.jar
MultiVerse.jar
properTime.jar
NoCheat.jar
rawcritics_ore_obfuscation_plugin.jar