I have been noticing this problem on my machine the past week or so and it is driving me insane. Hopefully someone can help with this as i have spent a lot of time trying to figure it out with no luck. Issue: Randomly when i log in any of my 3 servers (on same machine) i have a 5-20 second delay after i am in game in loading chunks or issuing any commands. This also occurs any time i teleport, the delay happens again after any teleport. I have even opened the RDP to watch the console and the commands i issue to the server after log in are instantly sent such as /lag but takes 5-20 seconds for the server to respond back to me with the info in game chat. After the lag is over i am able to do any commands as normal and get an instant response form the server UNTIL i teleport then it starts its delay again. I notice this issue more when i jump between all my servers to admin and/or monitor them in game. If i should log out of my server and log into another server (not mine), then back to my server everything seems normal (chunks load instantly, commands respond back to me instantly and so on). Machine specs: Deditacted Blade server located in Phoenix Arizona E3-1230 v2 3.3GHz 4 core, 8 threads 16GB DDR3 RAM 64GB Samsung SSD drive - running my 2 main servers 500GB HDD drive - running windows, mysql and a non priority server Windows Server 2008 R2 MCMyAdmin professional x3 1GB port with 3200GB transfer limit (never reach limits) Currently using Spigot 417 Have tested with craftbukkit.jar What i have done and checked: I have checked with other players on the server and they do not have this problem other then one person that brought it up to me which has also stated he noticed it on a feed the beast server he plays on. I have also checked my network configs and all firewall rules and everything is no different then when i first started running my servers over a year ago. I also have netlimiter installed just for monitoring purpose and inbound/outbound traffic seems normal. This issue can happen with 10 players (100kbs average) on total or 80+ players (500kbs+) on total (kbs in brackets are total outbound traffic shown in netlimiter). I have tried using default minecraft.jar on my home PC thinking it could be on my end but still continues. My home connection is 18MB down, 3MB up and i connect to the server just fine at 120ms (ping) or lower.