General Performance Issues Viewing Large Pictures

[Maik Qualmann]

Again to make sure our DMemoryInfo class is working correctly. Please see the 
digiKam component info dialog. How much memory is shown as available on your 
system?

Maik

Am Montag, 26. Juni 2023, 22:07:06 CEST schrieb Tonio Kroeger:
> WAAAAAHHHHHHHH! :-) Yes 64GB. And now everything makes sense. Moreover I
> had a try with: digiKam-8.1.0-20230617T074456-x86-64.appimage
> The difference is tremendous. Thanks a lot!
> 
> Tonio
> 
> On Mon, Jun 26, 2023 at 6:42 PM Maik Qualmann <metzpinguin at gmail.com> wrote:
> > Is the specification of 64GB for the memory correct?
> > With this size, we calculate the image cache incorrectly, only a very
> > small
> > cache is created, so no larger images are preloaded in the preview. The
> > problem will be fixed in digiKam-8.1.0.
> > 
> > Maik
> > 
> > Am Montag, 26. Juni 2023, 18:12:19 CEST schrieb Tonio Kroeger:
> > > Hi all,
> > > 
> > > I am an enthusiastic digikam user for nearly 20 years now!
> > > 
> > > I am running 8.0.0. on an I7 under Linux with plenty of RAM (
> > 
> > https://www.intel.com/content/www/us/en/products/sku/205608/intel-nuc-11-p
> > ro> 
> > > -mini-pc-nuc11tnkv7/specifications.html). My picture collection became
> > 
> > huge,
> > 
> > > about 8TB (also many RAW files, roughly 300.000 Jpegs), and I still use
> > > SQLLite for the database.
> > > 
> > > In general everything works fine but when I switch to another picture
> > 
> > this
> > 
> > > takes up to 3 seconds. This is very anyoing especially when sorting out
> > > pictures. For the latter purpose I store incoming pictues on the
> > > internal
> > > SSD but this leads exactly to the 3 seconds from above, external
> > 
> > USB-drive
> > 
> > > is worse but not as worse as I would expect. I tried to precache all
> > > pictures into RAM, that did not significantly help. When I lower the
> > > maximal CPU frequency this seems to scale linearly with the time to show
> > 
> > a
> > 
> > > new picture.
> > > 
> > > Over the years my pictures became larger and larger. Today I have Jpegs
> > > around 20MB. (5MB Pics from my IPhone show up very fast.)
> > > 
> > > I wonder whether someone can give a hint where I might have an issue
> > > with
> > > my system. Is SQLLite a problem in my setting? Or are the 3 seconds just
> > 
> > my
> > 
> > > fate because of the many megapixel...
> > > 
> > > Best wishes & tnx
> > > 
> > > Tonio