I know there are topics sort of like this. I want to discuss an odd lag issue I'm having with maps that are 512x512x256. If you don't want to read the whole post, then here's the problem: Whenever I try to play a 512x512x256 map, I experience very severe lag, even if the map is completely blank.
I generated several maps using Omen, and tested them in single player creative mode:
-I made a 256x256x256 random grassland map. The size of the map file was 161 KB. When I played it, the map ran very smoothly and I had no FPS issues.
-I made a 512x512x128 random grassland map, 128 being the height. The size of the map file was 497 KB. When I played it, the map ran just as smoothly as the 256^3 map.
-I then made a 512x512x256 random grassland map, 256 being the height. The size of the map file was 655 KB. When I played it, the lag was completely unbearable. I don't think I ever got more than 1 FPS. I tried playing with all levels of fog, but the fog had no effect on the FPS at all. I found it very odd that I had hit such a wall just from adding 128 to the height of the previous map.
-Then I tried a 512x512x256 flatgrass map. The size of the map file was 65 KB. Same issue: unbearable lag no matter what.
-Then I tried a 512x512x256 empty map. The size of the map file was also 65 KB, oddly. And the unbearble lag still persisted, which didn't make any sense to me because there wasn't a single block in the entire map.
Does anyone else have this issue, or an explanation?
OK, here's the specs:
AMD Athlon 64 X2 Dual Core Processor 3600+
2.5 GB of RAM
My video card is an Nvidia GeForce 8600 GT
Is that the right information? I just typed what it said in the System Properties. I think my computer is fairly good; what really puzzled me was when I had 1 FPS even in the completely empty map.
Check that you don't have any other programs taking up memory on your computer, maybe clean up your computer using some tuning programs , and also check the priority of the java process on your computer. Some viruses can also slow down your computer to a crawl. It can't be your graphics card becouse My computer has the same model and runs a map like that at around 60 fps when fog is normal. You may need to increase your ram a bit, my computer is maxed out at 4 GB or ram.
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Thanks for the advice both of you, but I'm still having the same problem. I'm confident that my computer is virus free and fairly cleaned up of unused programs etc. As far as RAM goes, I would have to agree that I have enough. My processor is "dual core" though, so isn't that kind of like having two? So wouldn't that add up to 3.8 GHz? Sorry if that sounds totally stupid; I don't know much about computers.
I checked the Java process while playing Minecraft, and the priority was set to Normal. I was going to try to set the priority to AboveNormal, but a window popped up warning me not to do that.