I am getting stuttering for a few seconds at a time in what appears to be random places in the mine of our SMP server. When I get stuttering, the following appears in the log:
[Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache.recheckGaps' took aprox 534.087368 ms
[Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache' took aprox 574.113264 ms
[Client thread/WARN]: Something's taking too long! 'root.tick.level' took aprox 576.275117 ms
[Client thread/WARN]: Something's taking too long! 'root.tick' took aprox 577.2218 ms
[Client thread/WARN]: Something's taking too long! 'root' took aprox 585.468536 msSo far I have found no correlation with other people being on or doing specific things.
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I think I have the same problem in SP and SMP. I thought it was just my PC, Will check the log next time it happens.
POSSIBLE CONFIRMATIONI may have the same problem in SSP. At times my computer goes down to 0 fps for very long periods of time. At times restarting the game will help. When this happens I have very close to 100 % CPU usage in the root.tick.level.chunkCache.recheckGaps.checkedPosition < toCheckCount section of the debugging screen.
win 7 64 bit ultimate,Java 1.7.0_25 (64-bit) alienware m18-xr2 (i7-3940xm, dual nvidia gtx 680m in sli mode, 16 gb ddr3 ram 1600 GHz, 512 GB ssd)
I am having the same issues on my SMP. I copied the world to my local computer and experience the same problems in the same area of the world. I tried replacing the chunks with MCEdit to see if there was a problem with those particular chunks, but that did not fix the problem. The extreme lag persists, making the game nearly unplayable in this area of our world. Here's my log output:
[20:34:00] [Client thread/INFO]: Warning: Clientside chunk ticking took 1415 ms
[20:34:00] [Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache' took aprox 1415.619102 ms
[20:34:00] [Client thread/WARN]: Something's taking too long! 'root.tick.level' took aprox 1418.318004 ms
[20:34:00] [Client thread/WARN]: Something's taking too long! 'root.tick' took aprox 1419.380519 ms
[20:34:00] [Client thread/WARN]: Something's taking too long! 'root' took aprox 1437.981892 ms
[20:34:01] [Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache.recheckGaps' took aprox 1356.252147 ms
[20:34:01] [Client thread/INFO]: Warning: Clientside chunk ticking took 1357 ms
[20:34:01] [Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache' took aprox 1356.852351 ms
[20:34:01] [Client thread/WARN]: Something's taking too long! 'root.tick.level' took aprox 1359.162572 ms
[20:34:01] [Client thread/WARN]: Something's taking too long! 'root.tick' took aprox 1360.120666 ms
[20:34:01] [Client thread/WARN]: Something's taking too long! 'root' took aprox 1381.083577 ms
[20:34:03] [Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache.recheckGaps' took aprox 1377.456926 ms
[20:34:03] [Client thread/INFO]: Warning: Clientside chunk ticking took 1377 ms
[20:34:03] [Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache' took aprox 1378.102646 ms
[20:34:03] [Client thread/WARN]: Something's taking too long! 'root.tick.level' took aprox 1380.981833 ms
[20:34:03] [Client thread/WARN]: Something's taking too long! 'root.tick' took aprox 1382.0381 ms
[20:34:03] [Client thread/WARN]: Something's taking too long! 'root' took aprox 1403.58649 ms
[20:34:05] [Client thread/WARN]: Something's taking too long! 'root.tick.level.chunkCache.recheckGaps' took aprox 1402.137525 msSame here but I don't get any log entries. Also it happens to me after some random time for a couple of seconds - no matter where I am (caves, base, overworld...).
The cpu usage of the Minecraft process is the only one that has a high value (~80% - 100%).
I've never played on single player, always on a vanilla multi player server.
My system is a Acer Aspire 6930G notebook with Windows Vista Home Premium (32 bit) and Java 1.7.0_45.
Before Version 1.7.2 it never happened to me.
Ezekiel
Duplicate of MC-36883