Okay so today my server has had chat lag , im not sure what the issue is as i have not been on

My Internet Speed Is 143 Download And 43 Upload

Here Is A List Of The Plugins

-WorldEdit
-Essentials
-NoFallDamage
-GroupManager
-Plugman
-Votifier
-WorldGuard
-EssentialsChat
-CustomCrates
-Vault
-Galistener
-EssentialsSpawn
-MyCommand
-ActionBar
-Dynmap
-Rankup
-PlotMe
-Whatisit
-ColoredTags
-DynmapPlotMe
-MineResetLite
-Holographic Displays
-SimpleBroadcast
-ClearLag
-PlayerPing

Server has 5Gb Of Ram

Anyone Know What The Problem Could Be ?