How to disable ChunkManager logging for MongoDB? mongoconfig.log gets huge
I have not tested this myself. 

Reference:


https://docs.mongodb.com/manual/reference/configuration-options/#systemlog-options
https://docs.mongodb.com/manual/reference/program/mongos/
https://docs.mongodb.com/manual/reference/command/


You can do this by: 


  systemLog.quiet Type: boolean
  
  Run mongos or mongod in a quiet mode that attempts to limit the amount
  of output.


systemLog.quiet is not recommended for production systems as it may make tracking problems during particular connections much more difficult.


  --quiet 
  
  Runs mongos in a quiet mode that attempts to limit the amount of output.
  
  This option suppresses:
  
  
  output from database commands
  replication activity connection accepted
  events connection
  closed events
  


All Sharding Commands are listed under database commands which I assume will suppress the logging you are referring to.