I recently switched from 16.2.x to 18.2.x and migrated to cephadm, since the switch the cluster is constantly scrubbing, 24/7 up to 50 PGs simultaneously and up to 20 deep scrubs simultaneously in a cluster that has only 12 (in use) OSDs. Furthermore it still manages to regularly have a warning with ‘pgs not scrubbed in time’ I have tried various settings, like osd_deep_scrub_interval, osd_max_scrubs, mds_max_scrub_ops_in_progress etc. All those get ignored. Please advice. Here is an output of ceos config dump: WHO MASK LEVEL OPTION VALUE RO global advanced auth_client_required cephx * global advanced auth_cluster_required cephx * global advanced auth_service_required cephx * global advanced auth_supported cephx * global basic container_image quay.io/ceph/ceph@sha256:aca35483144ab3548a7f670db9b79772e6fc51167246421c66c0bd56a6585468 * global basic device_failure_prediction_mode local global advanced mon_allow_pool_delete true global advanced mon_data_avail_warn 20 global advanced mon_max_pg_per_osd 400 global advanced osd_max_pg_per_osd_hard_ratio 10.000000 global advanced osd_pool_default_pg_autoscale_mode on mon advanced auth_allow_insecure_global_id_reclaim false mon advanced mon_crush_min_required_version firefly * mon advanced mon_warn_on_pool_no_redundancy false mon advanced public_network 10.79.0.0/16 * mgr advanced mgr/balancer/active true mgr advanced mgr/balancer/mode upmap mgr advanced mgr/cephadm/manage_etc_ceph_ceph_conf_hosts label:admin * mgr advanced mgr/cephadm/migration_current 6 * mgr advanced mgr/dashboard/GRAFANA_API_PASSWORD admin * mgr advanced mgr/dashboard/GRAFANA_API_SSL_VERIFY false * mgr advanced mgr/dashboard/GRAFANA_API_URL https://10.79.79.12:3000 * mgr advanced mgr/dashboard/PROMETHEUS_API_HOST http://10.79.79.12:9095 * mgr advanced mgr/devicehealth/enable_monitoring true mgr advanced mgr/orchestrator/orchestrator cephadm osd advanced osd_map_cache_size 250 osd advanced osd_map_share_max_epochs 50 osd advanced osd_mclock_profile high_client_ops osd advanced osd_pg_epoch_persisted_max_stale 50 osd.0 basic osd_mclock_max_capacity_iops_hdd 380.869888 osd.1 basic osd_mclock_max_capacity_iops_hdd 441.000000 osd.10 basic osd_mclock_max_capacity_iops_ssd 13677.906485 osd.11 basic osd_mclock_max_capacity_iops_hdd 274.411212 osd.13 basic osd_mclock_max_capacity_iops_hdd 198.492501 osd.2 basic osd_mclock_max_capacity_iops_hdd 251.592009 osd.3 basic osd_mclock_max_capacity_iops_hdd 208.197434 osd.4 basic osd_mclock_max_capacity_iops_hdd 196.544082 osd.5 basic osd_mclock_max_capacity_iops_ssd 12739.225456 osd.6 basic osd_mclock_max_capacity_iops_hdd 211.288660 osd.7 basic osd_mclock_max_capacity_iops_hdd 210.543236 osd.8 basic osd_mclock_max_capacity_iops_hdd 242.241594 osd.9 basic osd_mclock_max_capacity_iops_hdd 559.933780 mds.plexfs basic mds_join_fs plexfs Here is a ceph -s output services: mon: 3 daemons, quorum lxt-prod-ceph-util02,lxt-prod-ceph-util01,lxt-prod-ceph-util03 (age 3w) mgr: lxt-prod-ceph-util02.iyrhxj(active, since 3w), standbys: lxt-prod-ceph-util03.wvstpe mds: 1/1 daemons up osd: 14 osds: 14 up (since 4w), 14 in (since 4w) data: volumes: 1/1 healthy pools: 4 pools, 193 pgs objects: 14.48M objects, 52 TiB usage: 71 TiB used, 39 TiB / 110 TiB avail pgs: 131 active+clean 47 active+clean+scrubbing 15 active+clean+scrubbing+deep