[ceph-users] Ceph Apply/Commit vs Read/Write Op Latency

Hello, I was hoping someone could clear up the difference between these metrics. In filestore the difference between Apply and Commit Latency was pretty clear and these metrics gave a good representation of how the cluster was performing. High commit usually meant our journals were performing poorly while high apply pointed to an OSD issue. With bluestore Apply & Commit are now tied to the same metric and it's not as clear to me what that metric is. In addition new metrics such as Read and Write Op Latency have been added. I'm led to believe that these are similar to what Apply Latency used to represent but is that actually the case? If anyone who has a better understanding of this than I do can enlighten me I'd appreciate it! Thanks, John