Batch Queue Manager and database lock.

[Maik Qualmann]

I can reproduce the problem. I look for the cause.

Maik

Am Samstag, 12. August 2017, 17:53:52 CEST schrieb Gilles Caulier:
> Hi all,
> 
> I remember some fixes done in more and less recent version about BQM
> about database lock, especially from Maik.
> 
> While this summer i take a lots of panorama in French Alps. I use
> typically BQM in background to adjust the colors of target files (JPG)
> using a dedicated BQM workflow :
> 
> 1/ Local Contrast to render image as pseudo HDR (the photo is more
> luminous). 2/ WB tool to increase the saturation.
> 
> For ex : https://goo.gl/photos/FVisJdYHd4i8mZzF9
> 
> 
> Processing Pano files of 200Mpx in BQM take age. I don't use
> multi-core because my laptop has just 4 cores (i5). I want to use
> another one to perform triage, or use editor, or run Panorama tool.
> 
> And the problem appear. While BQM tool is running, navigating in album
> contents give empty views. No item are visible. When BQM is done, all
> re-appear. It's always reproducible.
> 
> I don't suspect a database lock, but something wrong with the
> ActionThreadBase instance from BQM which reserve all cores and block
> database interface which use also ActionThreadBase interface.
> 
> Typically, i think that set max cpu core to use with QThreadPool
> (inside ActionThreadBase) is something static. One QThreadPool is
> certainly a singleton in Qt and changing the number of threads in one
> instance of ActionThreadBase change the behavior for all
> ActionThreadBase instance.
> 
> What do you think about ? Can somebody can confirm the problem ?