Вы можете использовать API статистики индекса , который позволяет вам видеть, обрабатывались ли запросы поиска или индекса данным индексом с момента последнего перезапуска.
GET index/_stats
=>
"_all": {
"primaries": {
"docs": {
"count": 396885916,
"deleted": 1712210
},
"store": {
"size_in_bytes": 207383595268,
"throttle_time_in_millis": 0
},
"indexing": {
"index_total": 8, <-- writes are happening if you see this increase
"index_time_in_millis": 41,
"index_current": 0,
"index_failed": 0,
"delete_total": 0,
"delete_time_in_millis": 0,
"delete_current": 0,
"noop_update_total": 0,
"is_throttled": false,
"throttle_time_in_millis": 0
},
"get": {
"total": 0,
"time_in_millis": 0,
"exists_total": 0,
"exists_time_in_millis": 0,
"missing_total": 0,
"missing_time_in_millis": 0,
"current": 0
},
"search": {
"open_contexts": 7,
"query_total": 30238, <-- reads are happening if you see this increase
"query_time_in_millis": 254000,
"query_current": 0,
"fetch_total": 816,
"fetch_time_in_millis": 25997,
"fetch_current": 0,
"scroll_total": 7637,
"scroll_time_in_millis": 686963111,
"scroll_current": 7,
"suggest_total": 0,
"suggest_time_in_millis": 0,
"suggest_current": 0
},