How to compact OSD large omap having rocksdb as a backend keystore in RHCS ?

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Issue

Ceph OSD having too large OMAP directory and needs rocksdb compaction.
Why Ceph OSD is not responding and unresponsive due to rocksdb transactions ?

Environment

Red Hat Enterprise Linux 7.x
Red Hat Ceph Storge 2.4 and above
Red Hat Ceph Storage 3.x

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