Questions about improving the performance/speed of Ubuntu. Note that this is a general tag, and should be accompanied by another tag indicating what kind of performance you are referring to.

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3k views

Very high IOWAIT times

I have a large system - 128GB, a couple of RAID0 filesystems (6TB and 2TB) with an SSD cache, 8 cores (16 with hyperthreading), running Ubuntu 12.04 64bit. When I try to write a large file I get very ...
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139 views

Former Windows XP systems are slow after installing 14.04

I just replaced windows XP on our work computer with Ubuntu 14.04 32-bit, and it runs really slowly, only after logging into an account and the screen sometimes flashes. It doesn't fill the whole ...
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104 views

How to fix System Settings window lag

I wanted to open System Settings window and I waited ~30s. Then the window was opened. My machine has an Intel Core i7 processor and 16GB RAM. What produces a lag in opening System Settings? How can ...
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128 views

RAID6 Ubuntu rebuild - how to calculate best parameters for fastest rebuild

I am doing a resync on a RAID6 array and I am looking at some 2 days to complete. I looked here for hints on how to speed it up, but I have, instead, managed to slow it down! HW details are: 10x 4TB ...
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75 views

Basics about Nvidia GPU and graphics performance

Well, I'm new in this OS, and I already love it. Before I had Win7 but I'm not coming back. I installed it yesterday in my laptop, a HP Pavilion dv4-1528la with a GPU Nvidia GeForce 105M. Installed ...
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102 views

Window manager affects 3d performance - how to work around it?

I learned the hard way that enabling compositing VM will affect 3d performance. What can I do today to be able play games on linux with no performance penalty? I guess I could create user with ...
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101 views

Gnome3 runs faster when running game

I'm having a bizarre, and kind of funny, "problem"(if you can call it such). Ordinarily, Gnome shell is quite choppy on my system. Sure, it's smooth "enough" and fast "enough" but it most certainly ...
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612 views

My Laptop is running very slow when I installed ubuntu

I recently installed Ubuntu on my laptop, I have a pretty decent configuration that supports windows 8 very fluently but Ubuntu lags a lot while operating. This is my Laptop's configuration: ...
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2k views

GeForce 8600M GT: Nouveau performance better than proprietary driver?

After installing Ubuntu 12.10 on this computer, I installed NVIDIA's proprietary driver, since I might want to play a few games. I soon started having problems with video and audio. I'd be watching a ...
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48 views

CPU frequency is always at minimum, even if CPU isage is 100%

I don't know when this issue began to happen, it might have been since the time I installed Ubuntu (16.04, fresh). I was observing that Ubuntu was unusually slow, environment was choppy and CPU usage ...
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14 views

Ubuntu14.04 freezing up for no apparent reason

I'll be using my machine for anywhere from minutes to hours and eventually my computer will lock up. The interesting part is that my music keeps playing. I've tried every hotkey I can think of and I ...
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261 views

VMware workstation on Ubuntu 16.04 is slow

Before that my laptop had Windows 10 and VMware workstation 12 installed and it did run very well. But when I installed Ubuntu 16.04 and VMware in it, the performance is not good. VMware is lagging ...
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19 views

How can I improve my Z800 performance using Ubuntu?

I have been a Mac user until very recently when I decided to buy a new Desktop computer. Since I am mostly interested in bioinformatic work such as genomes and transcriptome analysis, the computer I ...
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24 views

I/O Performance on my mounted drive is extremely poor

I have a windows 7 machine. I have installed Oracle Sun Virtual Box here. On this Virtual Box I have Ubuntu 14.04.2 LTS installed. I have mounted a remote windows network share in my ubuntu using ...
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61 views

Slow Ubuntu 14.04 LTS on Dell PowerEdge R220

We installed Ubuntu 14.04 LTS 64-bit on Dell PowerEdge R220 server but the system is really slow. Do you know whether this is because of a missing driver or it is something else ? Memory: 3.7 GiB ...
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35 views

Java based application is really slow

I am using Ubuntu 16.04. I have a big problem with java based application. When I use java based application, the application always become really slow. The application I used are Cytoscape and ...
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32 views

How much will installing Macbuntu affect the performance of a low-spec system running Lubuntu?

How much will this theme affect performance on Lubuntu 16.04? The system in question has limited hardware. Intel Atom 1.66 GHz dual core, 1GB RAM. Will the performance impact be so small as to be ...
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43 views

Terrible performance

The pc is very slow when I turn it on, but when I restart it then it works normally without bad performance. I tried many distributions and all have this problem. I have a Toshiba C855D-S5307 with ...
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16 views

Regarding TTFB and CPU utilization relation

I have quick question regarding TTFB and CPU utilization time in waterfall chart. Is there any way to reduce TTFB in front end side? And would CPU utilization will affect rendering or any performance ...
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50 views

Ubuntu 14.4 running slow

I just bought the new Dell XPS 13 Developer edition which came preinstalled with ubuntu 14.04. After the initial boot it seemed a bit slow, but then it updated and worked fine, then later the same ...
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41 views

Ubuntu running extremely slow on P4 1GB RAM. New Install. Used to run well previously

i am currently running Ubuntu 14.04 64 bit on a Pentium 4 with 1 GB DDR2 RAM. It used to run butter smooth on 2 GB RAM. Unfortunately I had to remove 1 RAM card to use in another old PC. And now, in ...
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47 views

How to make dragging windows not lagging behind?

I am new to Ubuntu and I feel my window manager (I've tried Unity and Cinnamon so far) is not fully responsive. In fact when I take a window by holding its title bar and moving it around, the window ...
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49 views

Fresh Ubutnu 14.04 on External SSD slow

I installed a fresh copy of Ubuntu 14.04 onto a new USB3 connected SSD drive and it seems to be very slow. The slowdowns are particularly apparent when performing actions such as opening programs, ...
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47 views

kworker CPU hog - waking up from suspend

I have the (apparently very common) problem of 'kworker' hogging CPU usage. As mentioned here, the solution for many is identifying the problematic 'gpe'. This solution seems to apply to my situation, ...
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22 views

Performance issue when turning the pc on but dissapears when restarting

I am new to linux. My problem is that when i turn on the pc it is terribly slow, but when i restart the performance normalizes dissapears and the performance normalizes. I had the same issue also in ...
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24 views

Graphics and CPU Performance Programs

Are there any applications similar to "Razer Cortex" or "nVidia Experience" that will run on 15.10? I really love playing Counter-Strike: Source and Counter-Strike: Global Offensive but they lag ...
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21 views

Performance Alerts

Is it possible & how do I, in Ubuntu to setup a performance monitor / event at a certain performance. I want setup a monitor that calls a .SH script on a couple of things the first and major one ...
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13 views

What should be compared with ullimit -n

I know that max number of opened files per user is set in $ ulimit -n What is the right way to get a number to compare it with? My guess would be $ lsof | grep "REG" | wc -l but this number ...
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45 views

Performance mode in a Desktop enviroment

I'm running Ubuntu Gnome 15.10 x64 in a desktopPC. What really annoying me is that each restart or start begin running in a power-safe mode.. It could be useful with a laptop, but in a desktop ...
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47 views

Choppy windows, slow animation/performance

So basically I just did a fresh install of ubuntu 15.10, I installed a recommended driver, which is nvidia-352. I recorded a video to show what's happening http://www.youtube.com/watch?v=5BE7D4MOzF8 ...
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91 views

Why the screen is turning black and white in Ubuntu 14.04?

I am using Ubuntu 14.04. Frequently I am facing this issue of screen turning black and white for few seconds(20-30) and in that time I cannot use that application. I felt like(dont know this is ...
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26 views

Massive throttling when switch from charger to battery on Ubuntu 15.10

When I watch a 1080p video on youtube, I got easy 60 frames/s. But when I plug out the charger the framerate drops below 20 f/s (even if battery is 100&). The governor is set to performance, but ...
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96 views

Not able to run perf on linux 4.4 kernel

I'm not able to run perf on linux 4.4 kernel version. I'm using ubuntu 15.10. I have also installed linux-tools specific for this kernel. But when I try to run perf from the terminal I'm getting this ...
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36 views

xfs on raid0(mdadm) proper mounting

Reading manuals on howto tune xfs on raid is totally crazy. In my case I have raid0 of 2 disks with 512K chunk size. Physical disk block size is 4096 The correct su and sw should be su=512k and sw=2? ...
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90 views

Xubuntu 15.04 Live SD card on Atom N270-powered netbook: How do I improve boot time?

I know using Xubuntu in Live mode can be slow, even with persistent drive space. I was given a netbook whose SATA connector is not working. It's a bit expensive to repair it so I'm using Xubuntu 15....
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49 views

Live USB Xubuntu unresponsive BUT Kali USB distro running ok, how to fix it?

update: today it turned unresponsive. I Can barely use it for more than typing text in a text editor. adjusted the title accordingly. I'm not going to be able to buy a hard drive until 10 days and I ...
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104 views

Why my desktop Ubuntu system has lag when CPU is not full?

I have a desktop workstation installed with Ubuntu 14.04. It has i7-5820 CPU, 6 cores 12 threads. When I run my 10-threads code which takes up 80-90% CPU usage. (See monitoring statistics below). I ...
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64 views

System performance drop when adding a second monitor (zbook - ATI)

i have been trying to find a solution for this but can't quite make sense of it. I have a Zbook14 with hybrid ATI/Intel graphics card (AMD Radeon R7 M260 Series). Everything works like a charm when ...
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14 views

starting apps from kde menu are delayed about 2 seconds?

I got an immediate start when I do run applications like dolphin from terminal but when I do click on them in KDE menu it takes about 2 seconds to fully run, I see the icon beside cursor bouncing ...
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31 views

Slow Perfomance overall

could anyone tell me how to improve my system performance? It is very slow and I do not know the purpose of it. One idea that comes to my head is that my laptop is quite old, but I can recall that a ...
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749 views

Very poor performance drivers for Intel® HD Graphics 4600

I am new to Ubuntu and Linux. I have a HP Envy 17'' laptop and it comes with an i7-4710HQ processor with integrated Intel® HD Graphics 4600. I have Ubuntu 15.04 installed and I also installed the ...
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119 views

Slow performance on HDD - need advice how to tune it!

I have a MyCloud with a 3TB harddrive. It's incredibly slow when transferring large files over the lan (files about 1gb, give or take a few MBs). I think it has to do with the read/write-speed of the ...
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165 views

Slower than advertised SSD performance

I've just assembled new machine: Asrock AM1H-ITX, AMD 5350 with AES-NI, 8GB RAM, Samsung 850 EVO 120GB SSD Elementary OS based on Ubuntu 14.04 Advertised read/write of the SSD is something around ...
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101 views

Different performance of identical virtual machines

I have a desktop and a laptop both with i7, with 64-bit Win-7 OS. I installed VirtualBox with the same Ubuntu VM with exactly the same resources. I ran the same program into both VM's. The desktop is ...
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144 views

Is it possible to name the fastest virtual machine?

If yes, what is it and how is the performance of VM measured ? If no, please explain why it is impossible. I have an idea to test several VM by running C code and measuring time. One more thing, how ...
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49 views

Issue with resume from suspend

Hello Ubuntu, I am using Ubuntu 14.04 in Dual boot configuration, alongside Win 10. My machine is an Dell Inspiron 7537. My questions are based on following : Resuming from suspend ...
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39 views

How to test the performance of various software raid levels?

I am getting ready to reformat and reinstall the OS on my machine. I run a Postgres server on it that it mostly reads and not a lot of writes. It is backed up to external devices frequently so the ...
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21 views

Poor performance from Network adapter with wireless connections?

I'm facing performance issues with my wireless network adapter (or drivers, I'm not sure) on Ubuntu 15.04 and now recently, on my elementaryOS Freya installation. The same works fine when I log into ...
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221 views

Ubuntu 15.04 running slow

I used to have a Ubuntu 15.04 portable install on my flash drive - SanDisk Cruzer Edge 8GB. I was fairly satisfied with the performance and usability, but I ran out of space very quickly. I grabbed a ...
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134 views

why root user use 100% cpu in ubuntu 14.04?

When I am using top command in Ubuntu system there is root user always use 100% cpu uses and display goes to black and system taking lot of times for other process.