[ceph-users] PGs increasing number

Hello team, I have increased my volumes pool which was 128 PGs to 256 PGs , the activity started yesterday 5PM , It started when it was 5.733% of misplaced object , after 4 to 5 hours it reaches to 5.022 % after that it come back to the initial percentage 5.733% , kindly help to solve the issue. I am using Ceph Pacific deployed using ceph-ansible with ubuntu OS. the cluster is in production with openstack hypervisor. Best regards Michel