When running large batch that iterate over a cursor and each step takes long time, we often need to increase the cursorTimeoutMillis parameters (here we use the equivalent of 2 hours and we still have "unknown cursor" errors sometime).

With sessions we have the ability to refresh them (db.refreshSessions(sessions_ids_list)) so we can deal with long sessions that would normally expire.

Don't you thing it would be intersting to get the same refresh mechanism at the cursor level ?

db.refreshCursors(cursors_ids_list)