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<p>PS.</p>
<p>These are settings in dbgview:</p>
<p><img src="cid:part1.LchGxuJu.7uBNySC9@gmail.com" alt=""></p>
<p><br>
</p>
<p>Is this correct?<br>
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<div class="moz-cite-prefix">On 2023-05-08 18:48, Maik Qualmann
wrote:<br>
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<blockquote type="cite" cite="mid:4826485.31r3eYUQgx@linux-tpgn">
<pre class="moz-quote-pre" wrap="">Create a DebugView log (download from Microsoft). Activate in the digiKam
settings under System-> internal debugging, start digiKam again. Start
DebugView before, do things in digiKam that are slow and post the contents of
the DebugView window.
Maik
Am Montag, 8. Mai 2023, 16:01:34 CEST schrieb Thomas:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Hi,
First some background:
I have a fairly big collection.
Currently at more than 700 GB and more than 400k images.
Collection is hosted on a NAS over 1 GbE LAN.
The NAS server is plenty fast Xeon machine with 4 disks in RAID-1. The
files are shared via a samba server on Debian.
I have various client machines but they all express similar behavior.
The one I use the most is a fairly recent Windows machine with i7 CPU
and 64 GB RAM and NVMe disk.
My collection databases and sizes are shown below. Database files are
hosted locally on the NVMe.
The behavior I experience:
When I click a person in "People" tab, it is often many seconds or even
minutes before it shows the actual thumbnails of faces for this person.
I just tested this right now by clicking a random person in the list.
There were only 9 images of this person and it took more than 15 seconds
before the thumbnails were shown.
I took another person and did the same. This person had more than 8k
images. They were shown immediately in the top. But scrolled a but down,
the thumbs were blank. So I did that and waited. It took several minutes
(more than 2) for the thumbs to be shown this far down (probably about
10 % scroll down). I then scrolled a bit further down and they were
blank also. Took several minutes for DK to show thumbs.
Are these thumbnails not cached in the thumbnail database?
I mean, all the DK database files are less than 6 GB. They can easily
fit in RAM. Even if they had to be read from the NVMe, the entire 6 GB
can be read from NVMe disk in less than 7 seconds. (tested it using raw
read of the files without them being cached).
Another issue happens when I go to Albums and find some image. Then
doubleclick it to open the image in preview mode. It often takes several
seconds to open the image. Now, I am not sure if the preview is actually
loaded from the NAS or if it is loaded via the thumbnaildb? But it not
unusual for this to take 5 seconds or more. This makes browsing images
feel extremely sluggish.
So what is happening here? Is it something wrong in my setup?
What is the most likely bottleneck here?
1. The database files? If so, are they properly indexed? Are the proper
settings used relating to sync, locking, etc? Are the databases
loaded into memory or cached in memory when there is sufficient RAM?
2. Is the NAS to blame? I monitor performence metrics relating to disk
and I/O on the machine and I see no obvious bottlenecks / high
utilization on the server while doing the above actions with DK.
3. Is the samba network protocol to blame?
4. Hardware on client or server (I have a hard time seeing this being
the case)
5. Is it the network bandwidth between NAS and clients? This is low
latency 1 GbE ethernet. It can easily do about 100 MB/s and I have
verified this using iperf.
Could it be something else entirely?
I would love to hear other users' experiences with how DK performs as
well as your collection/db sizes as well as client and server specs.
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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<pre class="moz-signature" cols="72">--
Mvh
Thomas</pre>
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