Pruning, Verify and Garbage Collection jobs are able to use quite some resources on Proxmox Backup Server. That is why we limit the configuration on these kind of jobs for Free accounts.
Verify-jobs especially are very IO-intensive and can cause serious load on servers if configured incorrectly. Also, since our servers are based on ZFS, the use of verifies is very limited.
Because of the load this causes, we have software in place that enforces the following policies for Free accounts: