Minecraft Forums

Mode: Singleplayer

Video settings: Fast graphics, smooth lighting off, 3D anaglyph off, GUI scale large, clouds off, fullscreen off, mipmap levels off, use VBOs on, render distance 8 chunks, max framerate unlimited, view bobbing on, brightness moody, particles decreased, use Vsync on, alternate blocks off, entity shadows off

Game output: Completely ignored arguments: [--nativeLauncherVersion, 286]
[14:46:55] [Client thread/INFO]: Setting user: bigbrony94
[14:46:55] [Client thread/INFO]: (Session ID is token:ee0da4a18774420e970feb36689fe004:cd50a711250341c9a31b8d768c97a092)
[14:46:57] [Client thread/INFO]: LWJGL Version: 2.9.4
[14:46:58] [Client thread/INFO]: Reloading ResourceManager: Default
[14:46:59] [Sound Library Loader/INFO]: Starting up SoundSystem...
[14:46:59] [Thread-6/INFO]: Initializing LWJGL OpenAL
[14:46:59] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[14:46:59] [Thread-6/INFO]: OpenAL initialized.
[14:47:00] [Sound Library Loader/INFO]: Sound engine started
[14:47:01] [Client thread/INFO]: Created: 512x512 textures-atlas
[14:47:06] [Server thread/INFO]: Starting integrated minecraft server version 1.8.8
[14:47:06] [Server thread/INFO]: Generating keypair
[14:47:06] [Server thread/INFO]: Preparing start region for level 0
[14:47:07] [Server thread/INFO]: Preparing spawn area: 47%
[14:47:07] [Server thread/INFO]: Changing view distance to 8, from 10
[14:47:08] [Server thread/INFO]: bigbrony94[local:E:a4a87e7f] logged in with entity id 236 at (62.39132161000216, 12.0, 74.47548745022767)
[14:47:08] [Server thread/INFO]: bigbrony94 joined the game
[14:47:19] [Server thread/INFO]: Saving and pausing game...
[14:47:20] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Overworld
[14:47:21] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Nether
[14:47:21] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/The End
[14:47:21] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2054ms behind, skipping 41 tick(s)
[14:47:40] [Server thread/INFO]: Saving and pausing game...
[14:47:40] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Overworld
[14:47:41] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Nether
[14:47:41] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/The End
[14:48:39] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2558ms behind, skipping 51 tick(s)
[14:48:49] [Server thread/INFO]: Saving and pausing game...
[14:48:49] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Overworld
[14:48:50] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Nether
[14:48:50] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/The End
[14:49:21] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2154ms behind, skipping 43 tick(s)
[14:49:31] [Server thread/INFO]: Saving and pausing game...
[14:49:31] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Overworld
[14:49:32] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/Nether
[14:49:32] [Server thread/INFO]: Saving chunks for level 'MY COFFEE FELL OFF A CLIFF'/The End

The blocks keep reappearing after I destroy them and I have no idea why. I don't know exactly how to reduce this kind of lag (Is it even a type of lag at all?) and I don't know what the game output means. Can someone tell me how to fix this problem?

Your computer is struggling for some reason.

"[14:47:21] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2054ms behind, skipping 41 tick(s)"

The client thread says that the block is gone, the server thread is running behind, the next update from the server says that there is a block there because it hasn't processed the breakage yet.

It isn't obvious from this log what the problem might be.

Moody is a more intensive setting.

Unlimited frames is more intensive.

VBOs cause performance decreases on some systems.

VSync also causes performance problems on some systems.

An incorrect memory configuration can cause performance problems.

world corruption can cause performance problems specific to a world or area in a world.

Actually world corruption can cause a chunk to be unchangeable. Spawn protection does the same thing. Do the blocks eventually go away or not?