[tor-relays] How effective is "NumCPUs"?

Hello,

a relay I'm running is currently at about 0.80 load average. It has a dual-core CPU and I have configured "NumCPUs 2". I'm still in the process of finding the bandwidth limit.

Should I keep increasing "RelayBandwidthRate" on the single Tor process, or is it a better idea to start a second process?

(Also, does a second process need its own identity, or can it use the existing one?)

Best regards, Alexander