Hello, On a Nautilus 14.2.8 cluster I am seeing large RocksDB database with many slow DB bytes in use. To investigate this further I marked one OSD as out and waited for the all the backfilling to complete. Once the backfilling was completed I exported BlueFS and investigated the RocksDB using 'ceph-kvstore-tool'. This resulted in 22GB of data. Listing all the keys in the RocksDB shows me there are 747.000 keys in the DB. A small portion are osdmaps, but the biggest amount are keys prefixed with 'b'. I dumped the stats of the RocksDB and this shows me: L1: 1/0: 439.32 KB L2: 1/0: 2.65 MB L3: 5/0: 14.36 MB L4: 127/0: 7.22 GB L5: 217/0: 13.73 GB Sum: 351/0: 20.98 GB So there is almost 21GB of data in this RocksDB database. Why? Where is this coming from? Throughout this cluster OSDs are suffering from many slow bytes used and I can't figure out why. Has anybody seen this or has a clue on what is going on? I have an external copy of this RocksDB database to do investigations on. Thank you, Wido