[ceph-users] Very slow backfilling

Hi, I have many 'not {deep-}scrubbed in time' and a1 PG remapped+backfilling and I don't understand why this backfilling is taking so long. root@hbgt-ceph1-mon3:/# ceph -s cluster: id: c300532c-51fa-11ec-9a41-0050569c3b55 health: HEALTH_WARN 15 pgs not deep-scrubbed in time 13 pgs not scrubbed in time services: mon: 3 daemons, quorum hbgt-ceph1-mon1,hbgt-ceph1-mon2,hbgt-ceph1-mon3 (age 36h) mgr: hbgt-ceph1-mon2.nteihj(active, since 2d), standbys: hbgt-ceph1-mon1.thrnnu, hbgt-ceph1-mon3.gmfzqm osd: 60 osds: 60 up (since 13h), 60 in (since 13h); 1 remapped pgs rgw: 3 daemons active (3 hosts, 2 zones) data: pools: 13 pools, 289 pgs objects: 67.74M objects, 127 TiB usage: 272 TiB used, 769 TiB / 1.0 PiB avail pgs: 288 active+clean 1 active+remapped+backfilling io: client: 3.3 KiB/s rd, 1.5 MiB/s wr, 3 op/s rd, 8 op/s wr recovery: 790 KiB/s, 0 objects/s What can I do to understand this slow recovery (is it the backfill action ?) Thanks you 'Jof