[Digikam-devel] high load problems when tagging

[Arnd Baecker]

Hi,

when associating tags, I encounter a substantial CPU load,
caused by (sometimes several) kio_digikamdates and
kio_digikamalbums processes.

The origin of this seems to be the following:
At some point one gets on the konsole:
"Noticed file change in directory /home/username/Pictures"
(i.e. the directory containing the database!)
this then triggers DIO::scan
which then calls in dio.cpp in
void Watch::slotDone(KIO::Job*)
    Digikam::AlbumManager::instance()->refresh();
    Digikam::AlbumLister::instance()->refresh();
I.e. those which then lead to the invocation of
kio_digikamalbums and kio_digikamdates.

One possible solution: do not set a
  d->dirWatch->addDir(d->libraryPath)
in AlbumManager::startScan() .
For me, this works fine! ;-)
However, I don't know whether there are any side-effects...
Gilles, Marcel, Andi, what do you think about this issue?

All this is for 0.9.x;
I haven't looked into 0.10 wrt to this issue.

Best, Arnd

P.S.: This might be or not related to
"Updating tags is slow when thumbnails are visible"
http://bugs.kde.org/show_bug.cgi?id=167056

I also found an older one
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=430380
which sounds similar.