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Do you have statistics on the size of the OSDMaps or count of them which were being maintained by the OSDs? No, I don't think so. How can I find this information?

Hmm I don't know if we directly expose the size of maps. There are perfcounters which expose the range of maps being kept around but I don't know their names off-hand.

FWIW I’ve been told that size of an OSDmap is roughly equivalent to `ceph pg dump |wc`, which if true would seem to mean that they’re trivially small for most purposes. Reality of course may be much different and/or nuanced.