Basically, index-centric statistics report aggregated data from different physical machines that are running in different environments. Monitoring such statistics seems less helpful when compared to node statistics or cluster statistics. Let's take a quick look at four different APIs.
Monitoring indices
Indices stats
It is useful to see statistics from the indices stats API, _stats. You can get an answer such as the number of search requests in terms of the specific index received, the total time to fetch documents in that index, or identify the hot indices inside your cluster. Let's take a look at cf_view. As shown in the response body of the following screenshot, the result reports two aggregations, which are primaries...
