Lightroom Classic: Background tasks not apparent after restart

  • 1
  • Problem
  • Updated 2 months ago
  • (Edited)
When background tasks are running and LR is shutdown, when LR is restarted the tasks continue, but there is no way to tell what task(s) are running, nor the ability to end the tasks.

This makes it difficult to cleanup any long running task that is present after a restart.
Photo of Patrick

Patrick

  • 17 Posts
  • 0 Reply Likes

Posted 2 months ago

  • 1
Photo of Bill

Bill

  • 261 Posts
  • 38 Reply Likes
  1. Why do you think that you need to clean something up? 
  2. Are you having a problem? 
  3. If you can't tell what is running, how do you know that something is running? 
  4. Defender could be scanning files. 
  5. Dozens of system tasks are always running. 
  6. If you have a browser open, it will have running tasks.
Photo of Patrick

Patrick

  • 17 Posts
  • 0 Reply Likes
LR suddenly died, before it died it had about 12 background tasks.  After restarting, LR very sluggish.  No background task are shown.  A look at the resource monitor shows that there are 105 threads doing IO to finish the prior tasks.  But now LR is not responsive whereas when background still able to use LR.   LR is the busiest  process and security is about 2% (I've provided exceptions for image files).   LR is running about 15% cpu 4.1 GHz 12 core with 64 GB ram, LR is using about 25 GB.

The point is that background tasks are visible when you start them up, but not when LR re starts.

The 105 to 107 LR threads are busy reading image files as part of the background tasks.
Photo of Bill

Bill

  • 261 Posts
  • 38 Reply Likes
That appears to be Lightroom in recovery mode. For example I needed to shut down Lightroom when it hadn't finished updating a large number of XMP files. It popped up a warning which I accepted and allowed the shutdown to proceed including a check of the integrity and backup of the catalog. Upon restart sometime later, it continued updating the XMP files. Lightroom ran a little slower but it was still quite responsive. Task manager wasn't specific as to the activity other than a modest amount of CPU and IO activity. I don't remember the RAM consumption. I too have 64 GB of RAM and Lightroom normally consumes a fairly large chunk.

As Lightroom is excellent at taking advantage of a high core count, my next machine will support at least 24 threads (12 currently) and 128GB of fast RAM.