[Snapshot Pro] Backups seem to spike server response time

Hi all

I am having an issue using Snapshot Pro. Whenever I run a backup or schedule a backup, it spikes my server response time (monitored through Uptime) over 13k ms. I've gotten server timeout errors when trying to connect immediately after starting a backup in the past. The backup keeps running but typically stalls out between 55-65%.

Could anyone point me in the right direction of addressing this issue, or at least understanding it?

Thanks in advance- let me know if further detail is needed.