When you don’t scrub your ceph pool it will scrub itself when you don’t want it to scrub: during working hours. To avoid that you can set the time in the night when scrubbing is allowed
the ceph config set is global for the cluster / all nodes.
root@pve-01:/etc/ceph# ceph config get osd osd_scrub_begin_hour 0 root@pve-01:/etc/ceph# ceph config set osd osd_scrub_begin_hour 22 root@pve-01:/etc/ceph# ceph config get osd osd_scrub_begin_hour 22 root@pve-01:/etc/ceph# ceph config get osd osd_scrub_end_hour 0 root@pve-01:/etc/ceph# ceph config set osd osd_scrub_end_hour 7 root@pve-01:/etc/ceph# ceph config get osd osd_scrub_end_hour 7 root@pve-01:/etc/ceph#