HistoryQueryHandler will dump the ring buffer of historical slow queries.

HistoryQueryTableHandler will output the running queries in a datatable.

RunningQueryTableHandler will output the running queries in a datatable.

SlowQueryHandler will output the current running query list.

number of items.

microsecs, think this is 5s.

MongoSlow holds the state of slow queries, we have to keep state as we poll every x seconds and want to emit the cumulative slow query time for each user/connection/query.

Query object to hold current query details for feeding to Prometheus metrics.