the mysql database was running out of space and we have to increase the pvc size for it.
nothing simple than that. just verified if we have enough free space left.
edited the pvc defintion of the mysql statefulset and set the spec storage size to 20 Gi.
a few seconds later the mysql database space was doubled.
**ceph version 15.2.8
**ceph-csi version: 3.2.1
kubectl edit pvc data-mysql-0 -n mysql