Lightroom Classic 15.2 super slow editing today; can this happen sometimes and if so why?

[studio_2]

Lightroom Version Number

15.2

Operating System

1. macOS 15 Sequoia

today I went through editing a very small batch of 80 photos from an event I shot yesterday, and LRC became super slow to the point I restarted several times. it became almost non-responsive. I don't remember last time this happened and I really don't know what caused it.

I run a Macbook pro with 32GB RAM and M1 Max processor, with the latest Sequoia Mac OS, connected to an external Benq 4K monitor.

honestly I don't know what's going on here but, if I had a tighter deadline it would have been a problem; normally it's decently fast. all settings have been optimised (use GPU for export and preview generation, full graphics acceleration enabled with M1 Max - Camera raw cache is 25GB). during import I created standard previews. I wasn't doing crazy edits

anyone experiencing this on 15.2?
or is it my Mac giving up the ghost?

 

[clee01l]

Some things to check. Classic uses lots of working storage (Free space on MacIntosh HD). If the available free space drops below 100GB, Classic will have problems allocating space for temporary files. Other Apps also use the same space. If the system slows and you normally have 100GB available for Lightroom, Reboot the system so that all programs will release their working storage. Once you are rebooted and back at 100GB or more, Lightroom performance should revert to normal levels

Another thing to watch is the Activity monitor. I find it especially good to graph CPU history

 

[studio_2]

Some things to check. Classic uses lots of working storage (Free space on MacIntosh HD). If the available free space drops below 100GB, Classic will have problems allocating space for temporary files. Other Apps also use the same space. If the system slows and you normally have 100GB available for Lightroom, Reboot the system so that all programs will release their working storage. Once you are rebooted and back at 100GB or more, Lightroom performance should revert to normal levels

Another thing to watch is the Activity monitor. I find it especially good to graph CPU history

thanks Cletus. I have 437GB of free storage in my mac. my RAW files are in a SSD drive. I tried editing now and it seems fine, but this morning it was really struggling to cope. how do I check how much space is "allocated" to Lightroom? seems plenty of free space in my Mac.
I thought the issue was more of other apps using up most RAM, but that doesn't seem to be the problem here.
how often do you reboot your editing computer? I should really do it more, but I also wish there was a way a prompt from Mac OS to tell that a particular app is struggling and a reboot is needed

 

[clee01l]

how do I check how much space is "allocated" to Lightroom? seems plenty of free space in my Mac.
I thought the issue was more of other apps using up most RAM, but that doesn't seem to be the problem here.

Lightroom and other apps will consume all that is available to satisfy its requirements.

how often do you reboot your editing computer?

Not often enough ;-) Unlike Windows OS where rebooting often is or should be a requirement. You can go weeks or even months without needing to reboot. I run Classic on my Mac Studio 7X24X 365 to keep in sync with the Adobe Cloud. My most recent reboot was to update to V26.3. I try to remember to exit Classic once a week to get a fresh backup catalog.

I should really do it more, but I also wish there was a way a prompt from Mac OS to tell that a particular app is struggling and a reboot is needed

You can probably set up a recurring reminder to reboot. That way you might never get into a situation where your apps are resource starved.