Diagnostic and Debugging

Here are some notes and bullet-points about diagnostic and debugging. Note that this document is not comprehensive and will be updated on time to time.

db.serverStatus

Used to get the diagnostic information about server.

• db.serverStatus().opcounters: Number of operations after the server has started. Read more.
• db.serverStatus().connections: Number of active and allowed connections with server. Read More
• db.currentOp(): List Current Operations running in server. Read More
  • Users with clusterMonitor can use currentOp.

Misc Points

• Without mentioning --auth option in mongod we can not enforce the roles.
• You can check which flags are used to start mongod using following command

  db.adminCommand(
  {
      getCmdLineOpts: 1
  }
  )