Now anyone who has played Minecraft multiplayer would know that occasionally, the server will have a stutter, and no containers (chests, furnaces) etc. can be opened, along with all commands and chat become non-responsive. Today I got onto my singleplayer map world, and continued to work, but I started to experience lag. By lag i do not mean FPS lag, I run a solid 300 constantly. This seemed like server lag on singleplayer, which was confusing. I googled it and found the answer was allocating more RAM. I have 32 GB, and 16 allocated however. Is there anything else tat could cause this?