What I can't find is the 138,509 G difference between the ceph_cluster_total_used_bytes and ceph_pool_stored_raw. This is not static BTW, checking the same data historically shows we have about 1.12x of what we expect. This seems to make our 1.5x EC overhead a 1.68x overhead in reality. Anyone have any ideas for why this is the case?

May be min_size related? Because you are right, 6+3 is a 1.50, but 6+3 (+1) is a your calculated 1.67.

k