minecraft using 100% cpu

[aramil248]

when i run minecraft its using using 100% of my cpu with 5fps in singleplayer but its only using 30% ram is there anyway to stop minecraft from using all of my cpu and lag alot less?

[nsync]

What are ur sys. specs?

[dannyboy79]

not sure if it will help, but can't you use the minecraft launcher and specify you want it to use more RAM? maybe using more RAM it will use less CPU.

[Buddhalobes]

Hi, I'm having a similar issue so I decided to make my account and post my system specs.

MacBookPro 7,1 running Ubuntu 14.04 AMD x64 +Mac
Prossesor: Intel® Core™2 Duo CPU P8600 @ 2.40GHz × 2
Graphics: GeForce 320M/integrated/SSE2
Memory: 3.6 GiB (I have 4 gigs but I guess ubuntu takes into account what it needs to run and displays the rest)
Using OpenJDK Java7 Runtime

I'm using the ATLauncher to play both modded and vanilla Minecraft and have allocated 2.5 GiB to the launcher through it's built in settings. I launched the CrackPack (150 or so mods in the pack). Within an hour of launching I heard audio studdering and noticed slightly more fps choppyness than is normal moments before my screen froze and locked me from moving my mouse and acssesing terminal or any other keyboard shortcuts I could think of. I powered off with the powerbutton and retried with reckless abandon for the next few hours with more of the same result only it happend sooner with each attempt with the last one being moments after launch. This was yesterday (8/6/14).

Today I attempted to play vanila minecraft through the launcher and I had Htop open as a just in case alt-tab if problems arose, which they did. about 10 minutes in I noticed fps studdering but I chalked it up to it being the first night in minecraft chilling in a village with zombies moaning about. By the next night I had gotten rid of most of the zombies ability to span in the village but I was still getting choppy fps and a bit of input lag so I alt-tabed to htop and organized by cpu to see that both cpu cores were alternating between 70% and 100% (with 1 always at 100%) and all 2.5 GiB of allocated ram was being used across 2 java prosseses. This never happened in windows for me and I would dump my free time into modded minecraft, I need to craft. Hope this will help.

Thanks.

[mastablasta]

i take it that all desktop effects are off when you play it?

i have E3300 celeron (dualcore) with 1,3GB ram and it seems to run fine so far (Kubuntu). this computer acts as client while the server one is single core with 32 bit windowsXP home and 4GB ram. seems to be working fine. ok occasinally it lags (lots of TNT, train...), but otherwise it goes fine.

i am not sure why it is showing 3.6GB ram for you. i am not sure that is usual. but depends where you are wathicn ght ram i guess. the free -m command should show it well

[Buddhalobes]

i take it that all desktop effects are off when you play it?
Not sure how to so probably no.

free -m is showing me 3690 under total but I personnaly put 4 gigs in this since it shipped with just 1 gig.

[aramil248]

is this the specs you wanted?
computer description: Desktop Computer
width: 32 bits
capabilities: smbios-2.2 dmi-2.2 smp
configuration: boot=normal chassis=desktop
*-core
description: Motherboard
product: i845
physical id: 0
*-firmware
description: BIOS
vendor: Award Software International, Inc.
physical id: 0
version: 6.00 PG
date: 05/25/2002
size: 128KiB
capacity: 192KiB
capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification
*-cpu
description: CPU
product: Intel(R) Celeron(R) CPU 1.70GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 15.1.3
slot: Socket 478
size: 1700MHz
capacity: 2400MHz
width: 32 bits
clock: 100MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pebs bts
configuration: id=0
*-cache:0
description: L1 cache
physical id: 9
slot: Internal Cache
size: 8KiB
capacity: 20KiB
capabilities: synchronous internal write-back
*-cache:1
description: L2 cache
physical id: a
slot: External Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous external write-back
*-memory
description: System Memory
physical id: 1b
slot: System board or motherboard
size: 1536MiB
capacity: 3GiB
*-bank:0
description: DIMM SDRAM Synchronous
physical id: 0
slot: A0
size: 512MiB
width: 64 bits
*-bank:1
description: DIMM SDRAM Synchronous
physical id: 1
slot: A1
size: 512MiB
width: 64 bits
*-bank:2
description: DIMM SDRAM Synchronous
physical id: 2
slot: A2
size: 512MiB
width: 64 bits
*-pci
description: Host bridge
product: 82845 845 [Brookdale] Chipset Host Bridge
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 04
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel
resources: irq:0 memory:e8000000-ebffffff
*-pci:0
description: PCI bridge
product: 82845 845 [Brookdale] Chipset AGP Bridge
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 04
width: 32 bits
clock: 66MHz
capabilities: pci normal_decode bus_master
resources: memory:ec000000-edffffff memory:e0000000-e7ffffff
*-display
description: VGA compatible controller
product: NV34 [GeForce FX 5200]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 32 bits
clock: 66MHz
capabilities: pm agp agp-3.0 vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=248 maxlatency=1 mingnt=5
resources: irq:10 memory:ec000000-ecffffff memory:e0000000-e7ffffff memory:ed000000-ed01ffff
*-pci:1
description: PCI bridge
product: 82801 PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master
resources: ioport:c000(size=4096) memory:ee000000-ee0fffff
*-network
description: Ethernet interface
product: RTL8139 Ethernet
vendor: D-Link System Inc
physical id: b
bus info: pci@0000:02:0b.0
logical name: eth0
version: 10
serial: [REMOVED]
size: 100Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=full ip=[REMOVED] latency=32 link=yes maxlatency=64 mingnt=32 multicast=yes port=MII speed=100Mbit/s
resources: irq:11 ioport:c000(size=256) memory:ee000000-ee0000ff
*-isa
description: ISA bridge
product: 82801BA ISA Bridge (LPC)
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: driver=lpc_ich latency=0
resources: irq:0
*-ide
description: IDE interface
product: 82801BA IDE U100 Controller
vendor: Intel Corporation
physical id: 1f.1
bus info: pci@0000:00:1f.1
version: 05
width: 32 bits
clock: 33MHz
capabilities: ide bus_master
configuration: driver=ata_piix latency=0
resources: irq:0 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:f000(size=16)
*-usb:0
description: USB controller
product: 82801BA/BAM USB Controller #1
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 05
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:11 ioport:d000(size=32)
*-serial UNCLAIMED
description: SMBus
product: 82801BA/BAM SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 05
width: 32 bits
clock: 33MHz
configuration: latency=0
resources: ioport:5000(size=16)
*-usb:1
description: USB controller
product: 82801BA/BAM USB Controller #1
vendor: Intel Corporation
physical id: 1f.4
bus info: pci@0000:00:1f.4
version: 05
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:5 ioport:d800(size=32)
*-communication UNCLAIMED
description: Modem
product: 82801BA/BAM AC'97 Modem Controller
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
version: 05
width: 32 bits
clock: 33MHz
capabilities: generic
configuration: latency=0
resources: ioport:e400(size=256) ioport:e800(size=128)
*-scsi:0
physical id: 1
logical name: scsi0
capabilities: emulated
*-disk:0
description: ATA Disk
product: Maxtor 6Y060L0
vendor: Maxtor
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: YAR4
serial: [REMOVED]
size: 57GiB (61GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 sectorsize=512 signature=0009b9c6
*-volume
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: [REMOVED]
size: 57GiB
capacity: 57GiB
capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2014-06-04 13:45:29 filesystem=ext4 lastmountpoint=/ modified=2014-06-09 18:31:16 mount.fstype=ext4 mount.options=rw,relatime,data=ordered mounted=2014-06-09 18:31:17 state=mounted
*-disk:1
description: ATA Disk
product: Maxtor 6E030L0
vendor: Maxtor
physical id: 0.1.0
bus info: scsi@0:0.1.0
logical name: /dev/sdb
version: NAR6
serial: [REMOVED]
size: 28GiB (30GB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=9c5cdae6-06b4-4084-9fb9-a1c1a7cc68d5 sectorsize=512
*-volume
description: System partition
vendor: EFI
physical id: 1
bus info: scsi@0:0.1.0,1
logical name: /dev/sdb1
serial: [REMOVED]
capacity: 28GiB
capabilities: boot
configuration: name=primary
*-scsi:1
physical id: 2
logical name: scsi1
capabilities: emulated
*-cdrom
description: SCSI CD-ROM
product: Drive/G6D
vendor: CD-ROM
physical id: 0.1.0
bus info: scsi@1:0.1.0
logical name: /dev/cdrom
logical name: /dev/sr0
version: 1.30
capabilities: removable audio
configuration: ansiversion=5 status=nodisc

[dannyboy79]

yeah, unfortunately you're trying to run minecraft on a very underpowered machine. a celeron 1.7Ghz with only 1.5GB of ram and built in graphics may struggle to even play minecraft sadly.

[aramil248]

it runs everything else but minecraft good i think it must be java because even runescape lags for me

[Buddhalobes]

it runs everything else but minecraft good i think it must be java because even runescape lags for me

What else do you play on that machine because I cant think of much that could run ok on.



i take it that all desktop effects are off when you play it?

Not sure how to so probably no.

I'm still not sure how to disable desktop effects fully just while I'm playing (I like how unity looks too much to give it up full time) but I got Unity tweek tool and made some adjustments that also boosted my mincraft fps before it locked up on me again. I'm going to try using the nvidia legacy 304.117 proprietary rather than the Nvidia legacy 304.121 Open source driver next and I'll post my findings.

[mastablasta]

it runs everything else but minecraft good i think it must be java because even runescape lags for me

did you try with oracle java if it makes a difference? but yes, the CPU is kind of weak. and this game is CPu intensive i believe.



I'm still not sure how to disable desktop effects fully just while I'm playing (I like how unity looks too much to give it up full time) but I got Unity tweek tool and made some adjustments that also boosted my mincraft fps before it locked up on me again. I'm going to try using the nvidia legacy 304.117 proprietary rather than the Nvidia legacy 304.121 Open source driver next and I'll post my findings.

i am not sure how to do it in unity, but in KDE it's preety simple. you just untic a box and then when anyhting fullscreen is ran it turns off the desktop effects for that time.

if you find out that the Unity is the one taking resources a simple solution would be to add a very light Windows manager (e.g. icewm, jwm) and then when you want to game just logout and into icewm and start your game.

[aramil248]

i play star wars jedi knight jedi academy, openarena and unreal tournament 2004 to name a few

[mastablasta]

i play star wars jedi knight jedi academy, openarena and unreal tournament 2004 to name a few

then it should handle it reasonably well. however all those games are better optimised. also minecraft is preety CPU intensive. while those other games might be using GPU more. still if you can play all those games on mid/high setting it should probably work better in minecraft.

there is a command you could use to speed it up a bit. i don't know it right now so i would need to check at home if computer is not occupied.

have you tried the Oracle Java?

[aramil248]

i dont rember what type of java i have installed i did it by apt-get

[Buddhalobes]

After switching graphics drivers to nvidia legacy 304.117 by way of `sudo apt-get nvidia-current-updates`, updating with Software Updater and cold booting, I am now unable to log into minecraft.

I've redowloaded the launcher, reinstalled OpenJDK, checked my login to make sure it was correct and checked Mojang to see if they are up. No luck.

I'm at a loss now.

[mastablasta]

i dont rember what type of java i have installed i did it by apt-get

that one is opensource Java actually called IceTea or something like that.

[Buddhalobes]

After switching graphics drivers to nvidia legacy 304.117 by way of `sudo apt-get nvidia-current-updates`, updating with Software Updater and cold booting, I am now unable to log into minecraft.

UFW was preventing me from logging in, I turned it on while fumbling around with my other Minecraft issues. Also now I think I can modify my personal settings. *This was All part of my master plan and not at all me fumbling around like an idiot*

[wolflint]

Have you changed the drivers? The open-source drivers aren't suitable for gaming in my opinion.

[aramil248]

that one is opensource Java actually called IceTea or something like that.
i think i have the oracle java installed i see stuff about it under preferences

[mastablasta]

this is how i launch it

java -Xms512M -Xmx512M -jar '/home/user/.minecraft/minecraft launcher/MinecraftLauncher.jar'

i forgot what it does but works miracles on my old maschines

[Joey_Bui]

Me too when i run Assassin's creed with full Op....:sad::sad:

[DarkAmbient]

You could try Optifine, it's a mod that extends the tweaking ability of Minecraft. Which allows you to decrease the req. of Minecraft, or vice versa.

http://optifine.net/downloads.php

I managed to play Minecraft on atleast 20 fps on my old laptop with Arch Linux + xfce4, which has a 1.66Ghz cpu and only 512 MB of DDR-RAM.

[Buddhalobes]

You could try Optifine, it's a mod that extends the tweaking ability of Minecraft. Which allows you to decrease the req. of Minecraft, or vice versa.

http://optifine.net/downloads.php

I managed to play Minecraft on atleast 20 fps on my old laptop with Arch Linux + xfce4, which has a 1.66Ghz cpu and only 512 MB of DDR-RAM.

Unfortunately, this is not an issue of fps that can be addressed by dropping all settings to minimum and turning off all animations in game. This is an issue of the game, when loaded in a world, becoming completely unresponsive and forcing me to power down manually in order to regain my ability use my system. The usual suspects I am aware of have been ruled out over the last week or so and a solution has not been found.

[efflandt]

FX 5200 graphics was rather slow in its prime time, which was on a company desktop I got in 2003 and a personal desktop I bought in 2004. I promptly upgraded the video of that 2004 desktop, but also had to upgrade the PSU because the HP 250 watt PSU was overrated and could not boot half of that (125-130 watts at wall outlet after upgrading to 330 watt Antec PSU).

For anyone with integrated Intel video only, good luck. For some reason the Intel driver in Linux is significantly slower than in Windows even i7 2.4 GHz CPU with 8 threads. But fortunately my laptop also has nvidia graphics (GTX 765M).

[aramil248]

this is how i launch it

java -Xms512M -Xmx512M -jar '/home/user/.minecraft/minecraft launcher/MinecraftLauncher.jar'

i forgot what it does but works miracles on my old maschines
i tried it did not help also if i play any version above 1.7.2 i get 1-3fps on the main menu but on 1.7.2 and below i get about 10-20fps

[Buddhalobes]

I'd like to update this just in case someone comes accross this and is wondering. I switched out my HDD from the apple provided Hitachi (250gb, 2.5 inch sata, 5400rpm) to a Western digital (320gb, 2.5 inch sata 3, 5400 rpm) and just installed Ubuntu 14.04 LTS pretty much as is with only fixes found here https://help.ubuntu.com/community/MacBookPro7-1/Trusty.

Now everything runs significantly better, from the default unity environment to steam games to heavily modded minecraft. My issues were entirely hardware and there was very little that could be done to solve it aside from replacing the HDD. I joke now that minecraft on Ubuntu is an indicator of your system's health; If you can't run minecraft, start looking for new hardware.

Apologies for bumping an older post, but I felt it was relevant.
Thanks.