Indexing websites adds significant traffic to those sites. It’s not a good idea for the health of the internet for everyone to be Indexing, maybe you should search for a precompiled index you can train the lmm on and distribute it daily. Or do the crawling yourself and distribute that index.

Have you considered giving your linux install a little caffeine?

https://community.linuxmint.com/software/view/caffeine

Replaced the fan with a bad bearing on one of my proxmox hosts today. For a short while I figured I was going crazy because it seemed to stop making noise when I actually got close to the server, but it finally fully gave today and I was able to identify and swap it.