Questions tagged [optimization]

Optimization is a very broad term referring to optimizing (either minimizing or maximizing) some aspect of a computer system's hardware usage (like the hard disk space used by the system, the CPU and RAM used while running, etc.) or performance or resource usage (like electrical requirements).

Optimization can be used to refer to (note: this list is incomplete):

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How can I limit battery charging to 80% capacity?

I just learned that some Lenovo laptops include a utility that offers to limit battery charging capacity to within 0–80% in order to slow the attenuation of the battery lifespan: How can I do this in Ubuntu?
ændrük
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Lowering Compiz memory usage

I have been following the updates that appear every week in how they affect the performance and resource usage of Compiz since I installed 11.10 (Right now I am testing 12.04 and 14.04). For what I have seen, the CPU and memory usage have lowered…
Luis Alvarado
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How can I queue file operations?

When I pick and choose files to copy to or from a single device, Nautilus accumulates file operations in parallel: I worry that in certain circumstances this could cause fragmentation of the destination device, or transfer slowdowns due to…
ændrük
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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 imagine, when one's install modern Ubuntu on i386…
Ivan
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How can I reduce the size of a SVG using software on Ubuntu?

I would like to optimize a SVG using software on Ubuntu (and by optimize I mean to reduce the file size without loosing any visible parts of the graphic) and I do mean software I know there are some websites that can do this but I don't trust my…
Josh Pinto
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Open Source command line tool for optimizing PDF

Are there any open-source command line tool for optimizing PDF in Ubuntu. I have used Ghost Script and i am able to convert the PDF into 72 dpi, gs -sDEVICE=pdfwrite \ -dCompatibilityLevel=1.4 \ -dPDFSETTINGS=/screen \ -dNOPAUSE -dQUIET…
Rakesh
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How can I maximum compress video files?

I received 4 .mov files from a client that they want on their mobile website via SlideShowPro. Each original file was between 200 and 400 mb. I've gotten each one down to about 30 mb using transmageddon as described here, but that's still really big…
EmmyS
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Investigate disk writes further to find out which process writes to my SSD

I try to minimize disk writes to my new SSD system drive. I'm stuck with iostat output: ~ > iostat -d 10 /dev/sdb Linux 2.6.32-44-generic (Pluto) 13.11.2012 _i686_ (2 CPU) Device: tps Blk_read/s Blk_wrtn/s Blk_read …
zuba
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My boot time has increased by 25% in the past two months. How do I reduce it?

I used to have a boot time of ~35 seconds till 2-3 months back. Now it is about ~50 seconds or more. Shut down time has also doubled. Before it used to be at most 5 seconds. Now it is at-least 10 seconds. What is causing this ? More importantly,…
asheeshr
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Optimizing Boot-up

I installed bootchart to monitor my boot-up process. I had some problems with my booting time (>80sec) Before : https://i.sstatic.net/4tvky.png After some tweaking with Bum,Ubuntu-tweak and Start-up Manager i reached (>30sec) After…
Jai Puri
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If I compile Firefox instead of binary install it will work faster?

Many times I hear that software compiled at my hardware will work faster at my hardware. Can I win 10% of performance of Firefox or Chromium if compile from source?
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Sysvinit alternative of systemd-analyze and systemctl?

I am trying to tweak my system's start time. Usually I go about it by using systemd-analyze blame Which gives me a list of stuff and how long it takes them to start. For this machine I don't need most of them, so it's a case of then systemctl mask…
John
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Is 'swap off' safe when app is running on production?

My app has several JVMs running in Linux and swap usage is mostly zero. However, sometimes by high traffic or slowness of database, JVMs consume swap memory, which is not recommended. If it happens, my plan is to recycle swap by 'swap off/swap on'…
Won
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Optimize bootup sequence

I'm on Ubuntu 11.04 (upgraded from 10.10) and suffering really high bootup times. It got so annoying, that I decided to dive into bootchart analysis myself. Therefore I installed bootchart and restarted the system which generated this…
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Find and disable unnecessary services in Ubuntu 12.04

I have been presented with a server running Ubuntu 12.04 LTS server edition. This machine was in use earlier for a web application and also has many other applications configured in it. Now, I want to remove all the un necessary applications from…
Tarun
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