Snapshot + Automate + Uptime Causing sluggish servers

We have 2 main servers and are adding some of the sites on them to The Hub. We have automated backups + automate + uptime set up. Ever since we set these up, our servers have been under very high load (often 10-20 on 8 core servers). We have Automate set up in blocks of ~30 sites per day, with 5-6 sites in each hour block. This is the only large scale change we've made to our sites recently. Is there something we've misconfigured or do we need to change our Automate/Backup settings?