Comment 3 for bug 1888909

The default osd op queue is 'wpq' for Luminous and above. With the weighted priority queue set, you can use the following workaround to address this issue:

Update the juju configuration to persist the new cut off setting:
juju config ceph-osd config-flags='{"osd": {"osd op queue cut off": "high"}}'

Take care when modifying config-flags to check for any existing flags that may have been set. The new flag must be merged with any that are already configured.

Then modify the run-time config by running the following command on the ceph-mon:
sudo ceph tell osd.* config set osd_op_queue_cut_off high