Minecraft Forums

Hi all,

Recently I have been having some Minecraft performance issues. It all started about 2 weeks ago when I noticed that my frame rate was much lower than usual, and I got frequent lag spikes. At first I wanted to ignore the lag, but it only got worse as I went on. I installed optifine (which I usually don't use), but the game pretty much ran the exact same. I allocated several more gigabytes to my profile (I play on regular 1.11 btw), and I don't know if that helped, and turned pretty much all of the game settings all the way down so that my minecraft would run as smooth as possible. I also don't have any background programs running, and I play minecraft on my laptop, as it is easy to take make the game portable that way.

I find this very strange because my laptop used to be able to run regular minecraft just fine, and I haven't done much changes in my main survival world anyway (such as generating colossal amounts of new terrain). Also, whenever I login to the world, I can get frame rates up to 100 fps and faster when all settings are as fast as possible, and I stand completely still after about 10 seconds. But once I move my mouse or move around, I usually get a huge lag spike, and now it has gotten to the point to where I am getting a lag spike every several seconds, and earlier today I have had lag spikes up to 10 seconds long. I cannot think of anything else to do as the performance has gotten worse as I go on and on.

I have also tried to observe the pie chart that pops up when you so shift+F3 that monitors how hard your game is working toward certain parts of running the game, and tried to see which chunks pop up as the biggest when the lag spikes reappear. Usually "game renderer" is the biggest chunk in the pie chart, and I suspect that is a normal sign. But when the lag spikes pop up, about 50% of the time, the "tick" section is the biggest section of the pie chart for a split second. The other 50% are all random parts of running minecraft I had never heard of, things usually labeled on the pie chart as taking up like, 0.04% of the RAM. I don't know if any of that information helped my case.

I have also connected to the world via LAN from my desktop computer, and on the desktop computer end, it runs PERFECTLY. I really don't want to have to play my world on my desktop, for several reasons that I don't really want to get into right now. Anyway, I feel like I am out of options, and I am now reaching out to the minecraft community for help. Has anyone had any kind of similar experience and/or what kind of suggestions do you have? I would really appreciate it. Thanks

Sounds to me like it'd be a CPU bottleneck, initially.

Could you post a DXDiag so we'd have more information about your PC?

(Here's a tutorial if you don't know how)

I agree with jtpetch that it's likely a hardware bottleneck. Minecraft is fairly CPU intense.

Does the lag spike happen if you're out of render distance of your base? Just trying to troubleshoot if any large redstone or mob farm contraptions that could be causing the lag spikes. It's possible you could have some data corruption that is causing odd issues like entities that are duplicating or things like that.

The game ran pretty smoothly when out of range, and the lag spikes occurred only about half as often as how my base would

"I allocated several more gigabytes" that right there is a problem, for pure vanilla dont allocate more than two and is you want to allocate more for modding or something always leave at least two gigs unallocated

Quote from creeperking22»

"I allocated several more gigabytes" that right there is a problem, for pure vanilla dont allocate more than two and is you want to allocate more for modding or something always leave at least two gigs unallocated

Yes it's true that java's garbage collection dumping could be causing or further exasperating the issue due to the larger memory allocation allowing more garbage to be accumulated and then a very large dump happening causing a lag spike. It's definitely best to not over do it when allocating memory to Minecraft, allocate only what you need.

While it could cause a bit of a performance drop, you're not going to feel it unless your CPU has the word "Atom" in it.

I've got 8gb (of 16) allocated usually, and I run Optifine and usually shaders. Only time It really helps me is when I host a lan game for friends, but I've seen 0 performance drops from default allocation to 8gb on my system. And I don't have that high end of a rig (specs in my sig).