Hi Marco,

Quoting Marco Gulino <marco.gulino@gmail.com>:

> Hi!
> as a user noticed me, there's an issue with thumbnails on growing files (on
> video thumbnail, currently, but i guess it could be found on other file
> types too, if big enough).
> The problem is that on each size update the kio_thumbnail process is called,
> which with a big file leads to a huge amount of processes.
> I can see a couple of solutions:
> one is to make kio_thumbnail exit when a file is marked as "growing" (don't
> know how to do it, but it has the advantage of being centralized).
> Another solution is to patch the application (or kpart) using the
> thumbnailer (i looked it yesterday, it should be in dolphin kpart).
> Feedback?
>

If this is caused by KFilePreviewGenerator, it might be possible to  
adapt a portion of my patch here:

https://bugs.kde.org/show_bug.cgi?id=168666

which was designed to prevent this situation.  I don't think(?) it got  
applied in the end.

Best Wishes,
Simon