Well for me I now would not dare use Plex Media Server for Photo Slideshows for large filtered selection - not until I know the Plex Dev Team have addressed the issues that resulted in database inconsistencies which have led to daily Plex Media Scanner.exe crashes on a server that I have now abandoned and started afresh with a new server.
A photo library of over 80,000 photos with a filtered selection of over 23,000 photos in a slideshow even when the requests are split at 3,000 at a time (following a major RARflix development to handle large slideshows and ensure no Roku or RARFlix crashes) the server after a while ends up with memory fragmentation on Windows 7 and crashes.
You might say why you need to do a slideshow for so many photos and it would take ages to go through them - well... the RARflix/Roku app has pause facility and continues where it left off so time does not come into it - in fact it is so resilient that you can take your server down / whole network down and it will pick up from where it stopped or lost the connection and continue ...
The last time I used this after server crashes I ended up with database inconsistencies where new metadata item numbers were assigned to photos/folders but the new IDs were allocated to the database entries before the thumbnail IDs were updated so lost all the thumbnails and ended up with every scan of the library section crashing when it completes going through all the objects and creates a file of all the work that needs to be done... All this stuff is still not addressed and I would not dare start such a slideshow on my new server considering the mess I ended up and the daily crashes that are still occurring on the old server - which I kept hoping one day the Plex Dev Team will want to investigate.....
Problems started to exhibit symptoms here back in February 2014 :
PMS 0.9.9.2 Errors - Cached Photo Files Not Found. What Deletes the Files?
Later discovered that the files were not deleted - simply not generated following the metadata ID change
and PMS 0.9.9.2 Many On The Fly Scans Lead to Memory Loss
This was sidestepped by a change to Plex Media Server that came in to remove on-the-fly-scans for photos
and Plex Media Scanner Issues / Crashes - Dev Resource?
Not all the same and some for other users were fixed.
and PMS 0.9.9.5 Recurring Scanner Crashes
and Now on PMS 0.9.9.5 - Thumbnails Gone for Most Photo Albums
The last post in this thread shows the problem where the 43Mb temp file produced at the end of the Photos Library Section scan gives a crash in Plex Media Scanner.exe every time
and my main outstanding topic on the issue with tons of diagnostic evidence:
PMS 0.9.9.5 - 0.9.9.10 Scanner Crashes / Massive Loss of Thumbnails on Windows
and this one to suggest that the order in which things are done is changed so as not to end up with orphaned thumbnail pointers in the database
PMS and Album Thumbnails - Order in Which Things Are Done When Re-Scanning
and a suggestion to re-create missing items eg album thumbnails
Feature Request: Re-Create Missing Media Plex Objects / Info
But may be the crashes were happening where it was trying to re-create the missing items - not sure.
and to this day my old PMS with the database inconsistencies and lost album thumbnails is crashing in Plex Media Scanner.exe at the end of the pass to scan the Photos Library Section and as it starts processing the temp file - which I did capture before it was deleted in one of my evidence sets !
So I stopped using Plex Media Server for the very use case that I needed it for : Photo Slideshow and Music. Instead just using it for Music and photo slideshows for very small selections. Cannot risk ending up with a database mess as happened before.