The Speed Factor -- Kubuntu vs. Gentoo

[Dotan Cohen]

2008/6/17 Lea Gris <lea.gris at noiraude.net>:
> Dotan Cohen a écrit :
>
>> SVG: scalable vector graphics. If you are using a jpg gif or png
>> background then this won't bite you. As for the other stuff, I'd like
>> to hear more as well.
>
> The new default background in Ubuntu is an SVG vector graphic
> representing a styled heron. This perticular background impact desktop
> performance somehow due to it beying heavy on CPU and memory do draw and
> redraw upon window moves unless you use compiz 3D rendering engine and
> effects. In this last case it just eat up memory for the entire layer.

The default background is an svg?!? Wow.

> As for the SATA problems, comments on the launchpad bug entry says it
> all. You may be able to have it fixed with a custom compiled kernel bug
> I hadn't tested this so, it may me more complicated to get if fixed. By
> the way this one has significant impact on overall disk and application
> performances.
>
> About the atime default, this esayly fixed by editing /etc/fstab and
> adding noatime to the mount options like:
>
> /dev/sda1 UUID=bca9dde...7f8 / ext3
> defaults,errors=remount-ro,noatime 0 1
>
> By the way, this last one is not a typically userfriendly adjustment. It
> require knowledge of linux filesystem options and behaviors as well as
> manipulationg the option on that fstab text file.
>
> At last, for the .xsession-errors:
> Just look at the size of this file just after one hour of use.
> Just look at what's inside this file (it is a plaintext log of
> application talks, huge and useless debug talks you won't need unless
> you are a developper.
> You can even have a taste of this all useless talk by invoking the Kde
> tools and programs via a shell window. This output gos stright to stderr
> or even stdout. If you launch from shell it dispaly on screen. Otherwise
> it is al redirected to the .xsession-errors file, thus each talk from
> applications you use on desktop need consant disk write access. Do you
> need this feature? Do you like performance impact with all this debug
> stuffs written to disk?
>
> I don't know how to fix this, realy this output should be turned off or
> silent by default and I guess theis has to be specified at compilation.
> The only thing you can do is softlink .xsession-errors to /dev/null, but
> you will have to redo it at each new sessions because it gets
> reset/erased uppon logout/login, or you wil need to protct the file with
> proper attributes to avoid the softlink to be removed.
>
> Regards
>

Linking error files to /dev/null is a bad idea. Even if some program
is writing too much data to an error file, there are other programs
that write to the file that one would _want_ to read. There is a
reason that the file exists.

Dotan Cohen

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