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Monitoring Reference

This document contains references of the different types of hosts, databases, and other statuses that may occur in Monitoring.

Host Types

The possible values for the “Type” column in the Deployment page are:

  • primary
  • secondary
  • standalone
  • master
  • slave
  • unknown
  • recovering

The “Host Type” selector on the advanced dashboard creator also includes:

  • conf
  • mongos


The host type column may also have the value “no data,” which means that Monitoring has not received any data from the Monitoring Agent for this host. For possible causes, see Troubleshooting.

Host Process Types

Monitoring can monitor the process types:

  • mongod database processes
  • mongod arbiter processes
  • mongos
  • Monitoring Agents

Event Types

Types of events in the Events section of the Ops Manager console:

  • new host
  • restart
  • upgrade

Alert Types

The available alert types are:

  • Old Host Version
  • Host Down
  • Agent Down
  • Now Secondary
  • Now Primary

Chart Colors

  • A red bar indicates a server restart.
  • A purple bar indicates the server is now a primary.
  • A yellow bar indicates the server is now a secondary.

Status Page

  • cpu time
  • db storage
  • page faults
  • repl lag
  • replica
  • network
  • cursors
  • queues
  • connections
  • background flush avg
  • lock % [1]
  • btree
  • non-mapped virtual memory
  • memory
  • asserts
  • opcounters-repl
  • opcounters
[1]For versions of MongoDB after 2.1.1, this chart has a drop-down menu next to the tile that lists available databases, including “global” to represent the global lock for this host. Select a database to see its lock utilization. See the documentation of lock reporting in serverStatus for more information.

DB Stats Page

  • collections
  • objects
  • average object size
  • data size
  • storage size
  • num extents
  • indexes
  • index size
  • file size

Database Commands Used by the Monitoring Agent

  • serverStatus
  • buildinfo
  • getCmdLineOpts
  • connPoolStats
  • _isSelf
  • getParameter
  • ismaster
  • getShardVersion
  • netstat
  • replSetGetStatus
  • shards.find
  • mongos.find
  • oplog.find
  • collstats -
  • sources.find (slave)
  • config.settings.find
  • dbstats
  • db.locks