Lightroom slows and then stops responding after many HDR (3 images each) operations are performed

[merv2gene]

After performing 50 to 60 HDR operations Lightroom stops responding.  LR slows as more HDR operations are done and then just stops responding.  Doing HDR, 3 images each, on dng files, Windows 10, 64g of memory, no other programs running, LR 9.3.  CPU usage is about 30% lots of free memory.

Thanks

[cmgap]

What are the file sizes of the 3 images that  you are combining with HDR? Have you tried emptying your cache  in the Preferences > Performance tab? What is  your Camera Raw  Cache settings set at? What happens if you bump that up?

[merv2gene]

Cache size is set to 25G, I have not tried purging.  Thanks for the tip!

Files are DJI dng from Mavic 2 Pro,  ~ 39MB each.  The camera is 20 MB sensor, and I have not figured out why the file size is so large.  The image size as reported from LR is 5464 x 3640.  On previous versions of DJI drone cameras the file size had always matched that of the camera sensor specification.

I have also experience the same LR symptoms slowing when processing  Canon CR2 images as HDR!

I have been processing more HDR images and-

  1 - I am in the Library module, not sure of previous times.

  2- I have been less agressive of keeping the "tasks", queue, full.  Peviously I was keeping 3 - 4 in the queue, this time just one or two and as a result I am not experiencing the same type of slow down that I have multiple times in the past.  I suspect there is a memory fragmentation problem of the queue.

Thanks