Measure the Read and Write Latency in CB DB Layer

[Debasis_Mallick]

Hi Team,

We need to measure read/write latency from the CB layer to the storage layer. After reviewing the documentation (Data Service Metrics | Couchbase Docs) , we found the following metrics. The definitions provided are brief. Could you share any blogs with more details on these parameters? Additionally, we attempted to measure these parameters using the REST API command, but it returned null, as shown in the screenshot.

kv_bg_load_seconds 
kv_disk_seconds 
kv_ep_bg_load_avg_seconds
sys_disk_queue 
sys_disk_time_seconds

Thanks,
Debasis