[Digikam-users] Digikam slow

[Gerhard Kulzer]

Am Friday 07 December 2007 schrieb Dotan Cohen:
> On 02/12/2007, Mikolaj Machowski <mikmach at wp.pl> wrote:
> > Dnia Saturday 01 of December 2007, Dotan Cohen napisał:
> > > The system: Ubuntu Feisty on AMD Duron 1.3 GHz, 1GB RAM, KDE 3.5.6,
> > > Digikm 0.9.2, 13,100 pictures in Digikam library which is on it's own
> > > disk partition. KDE thumbnails cache opened up to 100MB.
> > >
> > > The problem: Digikam is so slow that it is nearly unusable. When we
> > > open a folder/album in digikam we must wait 8 seconds before we see
> > > thumbnails. Then, they trickle in at 0.87 sec per thumbnail (200
> > > thumbnails in two minutes, 54 seconds on the clock). When a photo is
> > > deleted, we wait 8 seconds before there is any UI reaction.
> > >
> > > All apps run sluggish on this machine, but Digikam is really bad. What
> > > can I do to tweak it a bit? I may be an old timer, but in my opinion a
> > > 1300 MHz processor (with 1024MB RAM) should not be this bad.
> >
> > What disk do you have?
> > What returns:
> >
> > hdparm -tT {device}
>
> On an otherwise idle system, I get this for the drive on which
> /home/user/pictures is running:
> ubuntu at ubuntu-desktop:~$ sudo hdparm -tT /dev/sdb1
> Password:
>
> /dev/sdb1:
>  Timing cached reads:   340 MB in  2.01 seconds = 169.46 MB/sec
>  Timing buffered disk reads:  190 MB in  3.03 seconds =  62.79 MB/sec
> ubuntu at ubuntu-desktop:~$

Your cahced reads seem extremely slow to me. Look at what I get:
sudo hdparm -tT /dev/sdb1
/dev/sdb1:
 Timing cached reads:   7186 MB in  2.00 seconds = 3594.65 MB/sec
 Timing buffered disk reads:  174 MB in  3.01 seconds =  57.77 MB/sec

My disk seems to be a bit slower than yours, but the buffered read is always 
>50 times faster, whereas yours is only 3x faster.

I have no idea what the problem could be.

Gerhard



> Dotan Cohen
>
> http://what-is-what.com
> http://gibberish.co.il
> א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת
>
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
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