Minecraft lag help? (Not ordinary)?

I have been playing minecraft for about 4 years now and I have just recently ran into this problem. While playing on servers, even single player, I'm getting this weird lag. This is not fps lag, but it is the type of lag with bad internet. When I attempt to open a chest, kill a mob, or anything that needs to relay to the server I get lag. It acts like it has a bad connection but I get about a ping of 50. I have tried many different things and still no solution, I have had this for about 3 months. When I first start playing I get no lag but around 8PM at night I start to get lag. It takes up to 5 minutes to complete an action in game making it impossible to play. I have tried re-downloading java, and re-downloading minecraft. Still no results, I have tried on vanilla and modded servers, the same result is happening. Other people can see what I do on the server as well when I do it but it never happens for me. I can throw an item on the ground and other people can see it and a few minutes later I can see it for myself. I'm connected to teamspeak while playing and I get no lag on that. I can play other multiplayer games as well and get no lag. Its only for minecraft. Restarting does nothing.

Very strange Minecraft lag issue?

Whenever I go into a singleplayer world or a server, it feels like my mouse sensitivity is through the roof. I can only look at the sky or the ground, and I can't move without freezing. I even turned my mouse sensitivity all the way down to 1, and it still persisted. This was a fresh download on a new computer, running Java 8 64-bit, 3GB dedicated RAM, any minecraft version. I haven't a clue what's going on here, so any help would be appreciated. If you need any additional information, I will provide what I can.

Multiple worlds on a minecraft server?

I'm not asking about multiverse, but maybe where I can switch between which one runs on the server so I don't have to make a whole new server for each different world. Not really sure if it's possible but thanks anyways

My minecraft server properties file won't work?

I'm trying to make a server so me and my friend can play an adventure map but whenever i run the minecraft server, and open up the server properties in notepad, there's only 2 things…
#Minecraft server properties
#Mon Oct 20 21:08:53 EDT 2014
I've watched at least 5 videos and in all of them they have much more things like serever name and ops and stuff. Why does mine only have those 2 things?!

My minecraft dosent work! Mineplex?

Hi! My mineplex worked few days ago, But starting yesterday I tired to go on mineplex but it said "Can't resolve hostname." I did spell everything right. And there's no error, For the server, I use us.mineplex.com, and I searched up on google why mineplex dose not work and nothing really appeared up, btw I'm a macbook pro user.

Looking to be apart of staff on any minecraft server?

I'm willing to help you no matter how crazy the request is, i have owned 3 server, have been staff on 5, i take being staff serious as it is up to me on how good the server becomes, I'm trustworthy, honest and the word "grief" is not even in my vocabulary. I'm 15, i live in tx, and most of all i'm just looking to have fun and help someone out!
Skype: Alliancetwo1
My Youtube: https://www.youtube.com/...BrosGaming
Name: Rob
IGN: TheTwoShoeCow
Staff roll i wish to have: Admin or head Admin or Head mod maybe even Co Owner

Minecraft Failed to login: the authentication are currently down for maintenance error?

Hi guys… So far, minecraft is the funnest game i have on my pc and was always THE best game to lan on multiple pc's. A few days ago I decided to update my minecraft and I received the update 1.8…

Then this one time my and my buddies wanted to LAN it with all the correct software, all of us had 1.8 and the same launcher, but when the try to join my game (offline as usual) it say the following:
connecting to server… ( 1 second)
Logging in… (3 seconds)
Failed to login: the authentication servers are currently down for maintenance

this has never happened before… Please Help…

Added (1). I'm trying to create an offline LAN server and then it says on the pc's that tries to join "Failed to login: the authentication servers are currently down for maintenance".

Mincraft Servers with Anti-Griefs?

I'm looking for a survival Minecraft server with no Griefs, something like The Cube SMP Server that's hosted by mineplex. Please if you know any just tell me, and they have to be completely Vanilla