I tried to stop Emby but the CPU was still at 95+%. Clean up junk files that take high CPU and disk usage. 5% of the time rather than only 98% of the time? I stopped the stream but the CPU was still getting overloaded.
It took a couple of minutes to open a 5 GB PDF. Synology file indexing high cpu If the high CPU utilization doesn’t drop, continue to the next step.