How to know how many files can Ceph delete per 1 minute?

As the question says. Is there a way to find out how many files can Ceph delete per 1 minute?

A little backstory: Image hosting website, running Ceph FS on 8TB WD RED 3.5 HDD’s, around 51 TiB already used with 40408370 stored objects. All files are images. Currently, we are deleting 300 images per minute. Is it a lot, is it too little? Is there a way to find out the optional number for deleting images?