[Digikam-devel] [Bug 303546] New: Re-read metadata from images is very slow

[Michael Holtermann]

https://bugs.kde.org/show_bug.cgi?id=303546

            Bug ID: 303546
          Severity: normal
           Version: 2.7.0
          Priority: NOR
          Assignee: digikam-devel at kde.org
           Summary: Re-read metadata from images is very slow
    Classification: Unclassified
                OS: Linux
          Reporter: linux at michael-holtermann.de
          Hardware: Unlisted Binaries
            Status: UNCONFIRMED
         Component: Metadata
           Product: digikam

Hello,

because of a crash of my digikam database I have to re-import the metadata from
round about 22.000 images back into the MySQL database. I'm using the Ubuntu
PPAs built by Philip on an AMD 64x2 4200+ with 6GB of RAM.

Unfortunately, the process is very slow, shifting round about 1000 pictures per
hour, only.

top shows 84% CPU at mysqld and 35% at digikam, and 3% of MEM, both. iotop
shows nothing.

I guess the meta data reading is done by single kio_digikamtags? I see these
kind of process starting, living for ~6 seconds, and dying.

Any help or tuning hints would be appreciated....

Kind regards,
Michael

Reproducible: Always

Steps to Reproduce:
1. Select 1000 pictures
2. Select "re-read metadata from images"
3. waiting...

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