For those of you who use, or are thinking of using OpenSIPS in front of your FusionPBX to lighten the load on the internal SIP profile, you may be interested in this OpenSIPS blog post that I have just found entitled "Auto process scaling – a cure for load and resources concerns". It is a new feature in OpenSIPS V3.0.
https://blog.opensips.org/2019/02/25/auto-process-scaling-a-cure-for-load-and-resources-concerns/
https://blog.opensips.org/2019/02/25/auto-process-scaling-a-cure-for-load-and-resources-concerns/