This is output of
mloginfo log --distinct. What does killcursors mean exactly and what's the DBA action? We use latest mongod in a 3 node replicaset.
With a search engine i found only on mongodb-user mailing list
Killcursors is a database command that removes cursor references on the server. It's normal and harmless. You'll probably only get an exception when inserting in safe mode.
I wish more info.
source: mongodb.log host: example start: 2016 Jul 15 07:35:28.419 end: 2016 Aug 19 08:00:15.874 date format: iso8601-local length: 244025 binary: mongod version: 3.2.8 storage: wiredTiger DISTINCT 64062 connection accepted from ... # ... ( ... now open) 63984 end connection ... ( ... now open) 4 killcursors: found ... of 3 assertion ... ns: ... query: 1 git version: 1 waiting for connections on port
2016-08-05T15:29:36.935+0200 I COMMAND [conn39339] killcursors: found 0 of 1 2016-08-05T15:29:36.937+0200 I COMMAND [conn39327] killcursors: found 0 of 1 2016-08-05T15:29:36.945+0200 I COMMAND [conn39329] killcursors: found 0 of 1 2016-08-05T15:29:36.946+0200 I COMMAND [conn39343] killcursors: found 0 of 1