many pveproxy workers could point to a few issues:
* you or someone are running many queries against the API, which need those resources (check /var/log/pveproxy/access.log for activity)
* something is not running correctly - in that case check the system journal (`journalctl --since 2021-01-09` for the log since 09.01.2021)
* just in case also check `dmesg` for messages from the kernel
I hope this helps!