Hi @Naveen_Nisad,
You can check for “last_known_scan_time” in “/api/v1/stats” REST call to indexer process. Please check the documentation. Note that the value of “last_known_scan_time” will NOT reset itself across the process restart. This stat was added in Couchbase Server version 6.5.0.
There is another stat “num_requests”, which will tell you number of requests served by that index - since the process comes up. But this value will be lost after the process restarts.
Also note that these values are correct for one instance (or replica) of the index. So, in case of multiple replicas, you will need to separately check with all the indexer nodes in your cluster.
Hope this help.