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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228
votes
37answers
144k views

How can I improve Ubuntu overall system performance?

What are your tips for improving overall system performance on ubuntu? Inspired by this question I realized that some default settings may be rather conservative on Ubuntu and that it's possible to ...
110
votes
13answers
78k views

How do I optimize the OS for SSDs?

What steps should be taken before/during/after installation of Ubuntu on a Solid State Drive to optimize performance and ensure maximum durability of the drive?
63
votes
5answers
138k views

How to check hard disk performance

How to check the performance of a hard drive (Either via terminal or GUI). The write speed. The read speed. Cache size and speed. Random speed.
61
votes
6answers
10k views

How do we get this magic performance-boosting 200 line patch?

I read today on Phoronix that there is a 200 line patch to the Linux Kernel which dramatically improves desktop responsiveness. How can Ubuntu users get this in a way that's supported?
48
votes
2answers
40k views

Is it worth to tune Ext4 with noatime?

With previous versions of Ubuntu (using Ext3 filesystem) I used to tune it for better performance with noticeable results by setting the noatime parameter in /etc/fstab. Is it still worth it to do ...
46
votes
9answers
53k views

How to empty swap if there is free RAM?

When I open a RAM-intensive app (VirtualBox set at 2GB of RAM), some swap space is generally used, depending on what else I have open at the time. However, when I quit that last application, the 2GB ...
41
votes
10answers
23k views

How can I strip down Ubuntu?

I'm trying to fix what I consider a bloated install of Ubuntu. When I install Ubuntu on a machine, I get things that I don't want - web browsers, office applications, media players, accessibility ...
33
votes
14answers
31k views

How do I improve boot speed?

I have seen many videos that make Ubuntu faster, but only makes the desktop faster. I am looking to make my computer boot faster. Is their anything i can do to make Ubuntu boot significantly faster?
27
votes
13answers
9k views

Why are Flash applications so sluggish/crashy?

I've noticed that Flash applications tend to be more sluggish under Ubuntu than they do under Windows on the same machine. This is particularly noticeable when watching HD video or playing ...
24
votes
5answers
50k views

How to perform a detailed and quick 3D performance test

I am wondering how to quickly test performance of my 3D graphics. Since glxgears is not benchmark what should I use. Also glxgears sometimes stuck at 60FPS, you cannot even compare before/after driver ...
23
votes
5answers
6k views

How can I find out if a process is CPU, Memory or Disk-bound?

How can I find out if a process is bound to CPU, Memory or Disk?
22
votes
5answers
18k views

Why most people recommend to reduce swappiness to 10-20?

I have seen in several site which recommend to reduce swappiness to 10-20 for better performance. http://community.linuxmint.com/tutorial/view/998 ...
22
votes
3answers
18k views

What performance differences are there when installing with Wubi?

I know that Wubi is slower in disk IO, but I can't find anything about it online other than vague statements such as "slightly slower disk seeks". Has anyone done any benchmarks to quantify the speed ...
22
votes
6answers
23k views

Is it normal for compiz to consume 40% of my CPU with no other programs running?

When I have no other programs running, compiz takes up at least 40% of my CPU. Is this normal? If it is normal, is there anyway I could make this program take a smaller percentage?
21
votes
4answers
9k views

What are the common maintenance tasks?

When i was using windows, i used to run defrags, ccleaner and revouninstaller once a month to keep the system and the registry clean. I know ubuntu (and all linux distro) has a different system ...
19
votes
3answers
3k views

What in /home would benefit from being on an SSD?

In Is a 40GB SSD practical to use for ' / ' Jorge describes how he symlinks directories in his /home that would benefit from being on an SSD. The directories he names are ~/.cache ~/.config ...
19
votes
4answers
9k views

What is the performance overhead of encrypted /home?

I have a netbook with Windows on the second partition and Xubuntu (/ and /home) on the third partition. I selected to encrypt my home folder during installation. The performance of the netbook is ...
18
votes
4answers
14k views

How to remove the graphical user interface?

Okay my question is that, I want to run a heavy application, on a Virtual Machine (VirtualBox) with just 2 GB RAM (Windows 7 32Bit Host has 4 GB, 3.5 GB effective). Initially I thought of installing ...
18
votes
3answers
35k views

Gaming performance difference between Windows and Ubuntu

What are the pros/cons switching from Windows 7/8 to Ubuntu? I mainly develop software and play games. I obviously don't play games on my laptop that's why I give Ubuntu a try. But the whole OS ...
18
votes
5answers
726 views

Do you ever have to do any regular maintenance?

For example, de-fragmenting, disc cleanup, or stuff like that?
16
votes
3answers
15k views

How can I measure the execution time of a terminal process?

I'm trying to measure the execution time of a process that I call via the command line (i.e., I want to find out how long it takes to for the process to finish). Is there any command that I can add to ...
16
votes
4answers
22k views

Why does kworker cpu usage get so high?

I recently installed Ubuntu 12.04 on my Samsung laptop alongside Windows 7. Whenever I use Ubuntu (even when its idle) kworker uses almost 90% of one of 8-cores. Even though it doesn't really affect ...
16
votes
3answers
21k views

High CPU usage while playing Flash

When I play video on YouTube CPU usage rises to 100% in both Firefox and Chrome. What I'm running: Processor Intel Core2Duo E4500 2 x 2.2GHz Ubuntu 12.04 amd64 with latest updates Flash Plugin ...
15
votes
10answers
6k views

Long wait time on login

When I log in on my server I get this: No mail. Last login: Fri Nov 5 14:22:45 2010... then I must wait for 5 sec and then is ready... wolfy@ubuntu-server:~$ Is this wait time normal or should ...
15
votes
4answers
59k views

How do I improve the performance of my VirtualBox guest?

I run a guest ubuntu 12.04 on a host ubuntu 12.04, with VirtualBox, and the guest is much, much slower than the host (ALT+TAB takes 4-5 secs). I had a look around and I found contradicting opinions on ...
14
votes
2answers
5k views

How to diagnose Ubuntu CPU spikes / IO wait?

I'm using Ubuntu and every couple minutes it goes unresponsive for a half second to a full second, which isn't normally a problem but makes trying to code extremely frustrating when your trying to hit ...
13
votes
8answers
22k views

Is Xubuntu really faster than Ubuntu?

I installed xubuntu desktop on top of ubuntu 12.04. The usage of RAM and CPU is in general lower than in ubuntu. But when it comes to some serious computations I did not see much of a difference ...
13
votes
4answers
4k views

How to fully utilize RAM to increase overall system performance

I have a low profile machine but with a lot of fast RAM, 4 Gb, which is really an amount of memory that i probably will never use, not even an half, since i just use this machine for coding and ...
13
votes
2answers
904 views

Why is mainstream Ubuntu still i386-compiled?

I pretty much believe (am I wrong?) that over 90% (if not over 99.9%) of Ubuntu 10.x i386 installations are run on i686 computers. So why is Ubuntu still not i686-optimized? The only case I can ...
13
votes
0answers
2k views

Is Wine what I think it is? [duplicate]

My first impression is that Wine is a simulated Windows environment which uses free (and presumably open source) libraries as an alternative to Microsoft's proprietary libraries. Those libraries ...
12
votes
5answers
3k views

What is the performance loss if you run an ubuntu desktop edition for a server machine?

Hello we have installed an ubuntu desktop edition on our dev server. I was wondering if there is any noticeable performance loss compared to the server edition.
12
votes
6answers
18k views

How much faster is Lubuntu? [closed]

Will I notice performance increases if I switch to Lubuntu? In what areas will I see the most significant changes? And in what areas am I unlikely to notice any? Would switching to Lubuntu be ...
12
votes
4answers
2k views

Ubuntu on low performance laptop [duplicate]

My sister has always wanted a macbook, but I recently convinced her that Ubuntu is a great OS with much more similarity to Mac OS than Windows. She said I can install Ubuntu on her laptop but it is ...
12
votes
5answers
21k views

Unity runs slow, how can I improve its performance?

I like how Unity looks but I have 2 problems: Unity 3D When I login with Unity 3D, my pc becomes slower, I got an AMD II X3 with 2GB of RAM, Nvidia Gforce 6150SE nForce 430/PCI/SSE2 integrated. When ...
12
votes
1answer
14k views

How do I monitor disk activity on a specific drive?

I'd like to watch disk activity on my USB external hard drive. I know that I can use iotop to monitor disk I/O for each running process, but is there a way to get a measure per filesystem?
12
votes
3answers
4k views

Is Gnome 3 lighter than Gnome 2?

As we are going toward Gnome 3, I would like to know what to expect. May be a more responsive desktop, faster startup of apps? Or should I start to thinking in another DE if performance is a concern? ...
12
votes
1answer
17k views

VNC session very slow in 12.04 compared to older versions

I have a 12.04 X64 Desktop install on a machine where I previously had 10.10. Previously I've used both the built-in vino and tightvncserver to provide the VNC session. I connect to them using Chicken ...
11
votes
4answers
2k views

Can I limit the CPU usage of a single application?

Is there a way to stop ClamScan eating my server CPU?
11
votes
4answers
5k views

How do I limit Dropbox's activity on the hard disk?

On startup, Dropbox runs files indexing, which brings the system pretty much to a stand still for three minutes. Is there a way to restrict Dropbox from accessing the hard disk, or decrease the ...
11
votes
4answers
30k views

Unity 2D on Ubuntu 13.04? Or is it too fast to matter

I've consistently always needed to stick to older computers at home. I've tried both 'Unity2D' and '3D' on my present computer (Toshiba Satellite, ATI Mobility 4200 series GPU, can post lshw if it's ...
10
votes
5answers
26k views

Best way to set up DNS caching?

In order to speed up DNS lookups, I want to install a DNS cache or proxy. I can see at least three programs I think will do the job: bind9, pdnsd, or dnsmasq. I would like to make sure that if I ...
10
votes
4answers
4k views

Is there a tool to measure speed of your pc/laptop?

In Windows 7 there is a tool that calculates some kind of index of your machine: the performance index. I am not sure how it is done, but it is nice to know, to be able to compare machines. Does ...
10
votes
6answers
9k views

Will running dual monitors have any significant impact on system speed?

Will setting up dual monitors on a decent-but-not-too-powerful machine significantly slow down my system? For specifics to my system, this is a 2GHz Intel Dual-core laptop with 4GB RAM and a decent ...
10
votes
9answers
6k views

Is 1GB RAM with integrated graphics sufficient for Unity 3D on 12.04?

I have been using Ubuntu since Hardy Heron (8.04). I used Natty, Oneiric with Unity. But When I recently (more than 1 month now) upgraded My Ubuntu to Precise (12.04), the performance of my laptop is ...
10
votes
3answers
707 views

How can I log my SSD's read performance over time?

I'd like to keep a log over time, perhaps weekly, of my solid state drive's read rate as determined by a tool like System -> Administration -> Disk Utility -> Benchmark: Is there a way to archive ...
10
votes
2answers
4k views

Does Ubuntu Touch consume less power than Android? [closed]

One of the problems of new OSs is power consumption. That is because power and performance requires a lot of tweaks and experience with the kernel, drivers and OS code-base on one hand, and a lot of ...
10
votes
1answer
3k views

How do I improve my server disk performance

I have an HP Microserver running Ubuntu 10.04 LTS. It's a low power server with 5 internal drive bays. I use it to backup my remote servers, VPSs and local laptops over the network. I want to get the ...
9
votes
2answers
9k views

Slow USB 3.0 speeds

Long time forum forager, first time poster. I bought a Toshiba 500 GB usb 3.0 hard drive last week and instantly ran home to see how fast I could push it. On my desktop (that I built) I was able to ...
9
votes
2answers
12k views

Ubuntu 13.04 CPU frequency scaling 'stuck' on lowest frequency

I've just installed Ubuntu 13.04 on my MacBook Air, after toying around for awhile the machine felt really slow, so I checked out the CPU frequency. cpufreq-info, it reports 800MHz on all 4 cores ...
9
votes
3answers
3k views

Computer running very slowly under 13.04

After having some bouts with windows 8 I decided to throw it out and run Ubuntu as the main operating system. Currently I am having some problems with performance: Even when running the simplest ...