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Get Measurements of a Database for a MongoDB Process

Get Measurements of a Database for a MongoDB Process¶

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Resource
Response Elements
- Measurement Values
Example Request
Example Response

Note

Groups and projects are synonymous terms. Your {GROUP-ID} is the same as your project ID. For existing groups, your group/project ID remains the same. The resource and corresponding endpoints use the term groups.

Get the measurements of the specified databases for a Atlas MongoDB process. A Atlas MongoDB process can be either a mongod or mongos.

The Atlas API uses HTTP Digest Authentication. Provide a programmatic API public key and corresponding private key as the username and password when constructing the HTTP request.

For complete documentation on configuring API access for an Atlas project, see Configure Atlas API Access.

Base URL: https://cloud.mongodb.com/api/atlas/v1.0

Resource¶

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GET api/atlas/v1.0/groups/{GROUP-ID}/processes/{HOST}:{PORT}/databases/{DATABASE-ID}/measurements

Request Path Parameters¶

Parameter	Required/Optional	Description
`GROUP-ID`	Required	ID of the project that owns this Atlas MongoDB process.
`HOST`	Required	The hostname of the machine running the Atlas MongoDB process.
`PORT`	Required	The port to which the Atlas MongoDB process listens.
`DATABASE-ID`	Required	The name of the database to retrieve measurements for.

Request Query Parameters¶

Field	Required/Optional	Description
`granularity`	Required	An ISO-8601-formatted time period that specifies the interval between measurement data points. For example, `PT1M` specifies 1-minute granularity. The supported values for this parameter are: `PT1M` `PT5M` `PT1H` `P1D` When you specify `granularity`, you must specify either `period` or `start` and `end`.
`period`	Required	An ISO-8601-formatted time period that specifies the length of time in the past to query. For example, to request the last 36 hours, specify: `period=P1DT12H`. Mutually exclusive with `start` and `end`.
`start`	Required	The time at which to start retrieving measurements, as specified by an ISO-8601 timestamp string. If you specify `start` you must also specify `end`. Mutually exclusive with `period`.
`end`	Required	The time at which to stop retrieving measurements, as specified by an ISO-8601 timestamp string. If you specify `end` you must also specify `start`. Mutually exclusive with `period`.
`m`	Optional	Specifies which measurements to return. If `m` is not specified, all measurements are returned. To specify multiple values for `m`, you must repeat the `m` parameter. For example: copy ../measurements?m=<measurement>&m=<measurement>&m=... You must specify measurements that are valid for the host. Atlas returns an error if any specified measurements are invalid For available measurements, see Measurement Values.
`pageNum`	Optional.	The page to return. Defaults to `1`.
`itemsPerPage`	Optional.	Number of items to return per page, up to a maximum of 500. Defaults to `100`.
`envelope`	Optional.	A boolean that specifies whether or not to wrap the response in an envelope. Defaults to `false`.
`pretty`	Optional	A boolean that specifies whether or not to return a “pretty-printed” JSON document. Defaults to `false`.

Request Body Parameters¶

This endpoint does not use HTTP request body parameters.

Response Elements¶

Free Tier

M0 Free Tier clusters return a subset of the metrics documented here.

If you set the query element envelope to true, the response is wrapped by the content object.

The HTTP response returns a JSON document that includes the following objects:

Name	Type	Description
`databaseName`	string	The name of the database to which the measurements pertain.
`end`	string	The end of the period for which to retrieve measurements, specified as an ISO-8601 timestamp.
`granularity`	string	An ISO-8601-formatted time period that specifies the size of the interval covered by each data point. For example, `PT5M` specifies a 5-minute granularity.
`groupId`	string	ID of the project that owns the Atlas MongoDB process.
`hostId`	string	The hostname of the machine running the Atlas MongoDB process.
`links`	array	An array of documents, representing a link to one or more sub-resources and/or related resources such as list pagination. See Linking for more information.
`measurements`	object array	An array of measurements and their data points.
`measurements.dataPoints`	object array	An array of objects, where each object represents a single data point. If there is no data point available for a particular moment in time (i.e., a timestamp), the `value` field is set to `null`.
`measurements.dataPoints.timestamp`	string	The timestamp of the beginning of the time interval represented by this data point.
`measurements.dataPoints.value`	float	The value of the data point.
`measurements.name`	string	The name of the measurement. For possible values, see Measurement Values below on this page.
`measurements.units`	string	How the measurement is quantified. Possible units are: `PERCENT` `MILLISECONDS` `BYTES` `GIGABYTES` `BYTES_PER_SECOND` `MEGABYTES_PER_SECOND` `GIGABYTES_PER_HOUR` `SCALAR_PER_SECOND` `SCALAR`
`processId`	string	The hostname and port of the machine running the Atlas MongoDB process.
`start`	string	The start of the period for which to retrieve measurements, specified as an ISO-8601 timestamp.

Measurement Values¶

DATABASE_AVERAGE_OBJECT_SIZE
DATABASE_COLLECTION_COUNT
DATABASE_DATA_SIZE
DATABASE_STORAGE_SIZE
DATABASE_INDEX_SIZE
DATABASE_INDEX_COUNT
DATABASE_EXTENT_COUNT
DATABASE_OBJECT_COUNT
DATABASE_VIEW_COUNT

Measures the database’s on-disk storage space, as collected from the MongoDB dbStats command.

Example Request¶

Replace the information in brackets {} with your own Atlas information to execute this example request:

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curl -u "<ATLAS-USERNAME>:<API-KEY>" --digest -i "https://cloud.mongodb.com/api/atlas/v1.0/groups/{GROUP-ID}/processes/{HOST}:{PORT}/databases/measurements?granularity=PT24H&period=PT24H&pretty=true"

Example Response¶

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{
   "databaseName":"monitoring",
   "granularity":"PT1M",
   "groupId":"12345678",
   "hostId":"shard-00-00.mongodb.net:27017",
   "links":[
      {
         "href":"https://cloud.mongodb.com/api/atlas/v1.0/groups/12345678/processes/shard-00-00.mongodb.net:27017/databases/monitoring/measurements?granularity=PT24H&period=PT24H&pretty=true",
         "rel":"self"
      },
      {
         "href":"https://cloud.mongodb.com/api/atlas/v1.0/groups/12345678/processes/shard-00-00.mongodb.net:27017",
         "rel":"http://mms.mongodb.com/host"
      }
   ],
   "measurements":[
      {
         "dataPoints":[

         ],
         "name":"DATABASE_AVERAGE_OBJECT_SIZE",
         "units":"BYTES"
      },
      ...
   ],
   "processId":"shard-00-00.mongodb.net:27017"
}

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