LrC 10.2 is consuming memory at an alarming rate when Tethered Live Shooting is activated for Nikon cameras on Windows 10. It looks very much like a memory leak of huge proportions.
This problem is considerably worse for some Nikon DSLR camera models than others. Initially @Steve Martin reported this problem with his newly purchased Nikon D7500.
I tested with my Nikon D750, and although there was evidence of a slow memory leak, I couldn't reproduce the severe memory leak Steve was seeing on his computer.
After trying everything from resetting preferences to reinstalling LrC and trying on a different computer, Steve tried a Nikon D90 and found it was worse than the D7500.
I have a Nikon D90 which I could use to do testing and can confirm his problem on my own Windows 10 PC computer.
Starting LrC 10.2 in Library Grid view with an empty folder selected, LrC soon settled into an idle state using the small amount of memory shown in the screen shot below taken after 5 minutes of doing nothing.
Now things get very bad. Leaving LrC in Live shooting mode while doing nothing else (no exposure settings changed, no shots taken), memory usage rapidly climbed at an astonishing rate, and after 10 minutes had passed, LrC had taken over 10.8GB.
At this point I disabled Live shooting, but left Tethered Shooting active. Memory use by LrC increased slowly and after 2 more minutes, had not changed very much.
I activated Live shooting again and immediately LrC began its relentless consumption of memory. After another 2.5 minutes it had reached a staggering 12.3 GB, as shown in the screen shot below.
Greetings, Updates to Camera Raw, Lightroom Classic and the Lightroom Ecosystem products for Desktop, Mobile and Web, were released today and contain a fix for this issue. Please refresh your Creative Cloud application and install your update when it becomes available. Thank you for your patience.