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View Real Time Metrics

Note

Availability Cloud Manager can display real-time metrics for MongoDB deployments that Automation manages. Collection of real time data requires the MongoDB Agent.

Cloud Manager supports real-time metrics for mongod (replica sets and shards) and mongos processes.

To view real-time metrics, click the Metrics button for the desired deployment, then click Real Time.

Monitor deployment metrics to identify performance issues and determine whether your current deployment meets your requirements. To learn more about the metrics available to monitor your deployments, see Review Available Metrics.

Note

To access this feature, you must be have the Project Owner or Project Data Access Admin Cloud Manager user roles.

In the upper-right corner, you can click to view the metrics in a Table or Graph.

Enable or Disable Real-Time Performance Panel for a Project

Note

Required Privileges

To enable Real-Time Performance Panel for a project, you must have the Project Owner role for the project.

Real-Time Performance Panel is enabled by default. To disable or enable the Real-Time Performance Panel:

1

Click Settings.

2

Toggle the button next to Real-Time Performance Panel.

Table View

Fields Displays
Commands
Queries
Updates
Deletes
Inserts
GetMores
Number of the specified operations (commands, queries, etc.) that mongostat has reported.
Time / Read
Time / Write
Time / Command
Latency metrics for current read requests, write requests, and other database commands. Available only for MongoDB 3.4+. To learn more, see opLatencies at serverStatus.
Scanned / Returned
Scanned Objects / Returned
Ratio of documents and objects scanned to documents and objects returned in current queries. These metrics are useful in determining if and how a query uses an index. To learn more, see Analyze Query Performance.
Active Readers
Active Writers
Queued Readers
Queued Writers
Number of active reads, queued reads, active writes, and queued writes that mongostat has reported.
Lag Time
Time required to replicate operations from the primary to the secondary members of a replica set. Available only for secondary members of a replica set. To learn more, see Replica Set Secondary Members.
CPU
Disk Util
Sys Mem

Statistic depending on the operating system of the nodes in your cluster:

  • Linux: Displays the currently used percentage of CPU and disk capacity and the total physical memory usage, excluding buffers, cache and swap space, of the machine hosting MongoDB.
  • macOS: Displays the currently used percentage of CPU and disk capacity and the total physical memory usage, excluding cache and swap space, of the machine hosting MongoDB.
  • Windows: Displays the currently used percentage of CPU and disk capacity and the total physical memory usage of the machine hosting MongoDB.
Connections
Bytes In
Bytes Out
Number of current connections to the machine hosting MongoDB and the number of inbound and outbound bytes that mongostat has reported.

Click ellipsis h icon to hide or display fields from the table.

Graph View

Chart Displays
Connections, Network In, Network Out Number of current connections to the machine hosting MongoDB and the number of inbound and outbound bytes that mongostat has reported.
CPU, Disk Util, and Sys Mem

Statistic depends on the operating system of the nodes in your cluster:

  • Linux: Displays the currently used percentage of CPU and disk capacity and the total physical memory usage, excluding buffers, cache and swap space, of the machine hosting MongoDB.
  • macOS: Displays the currently used percentage of CPU and disk capacity and the total physical memory usage, excluding cache and swap space, of the machine hosting MongoDB.
  • Windows: Displays the currently used percentage of CPU and disk capacity and the total physical memory usage of the machine hosting MongoDB.
Operations Number of operations as reported by mongostat.
Query Execution Times Displays latency metricsfor current read requests, write requests, and other database commands. Available only for MongoDB 3.4+. To learn more, see opLatencies at serverStatus.
Query Targeting Ratio of documents and objects scanned to documents and objects returned in current queries. These metrics are useful in determining if and how a query uses an index. To learn more, see Analyze Query Performance.
Reads & Writes Number of active reads, queued reads, active writes, and queued writes as reported by mongostat.
Replication Lag Time required to replicate operations from the primary to the secondary members of a replica set. Available only for secondary members of a replica set. To learn more, see Replica Set Secondary Members.
Hottest Collections

Collections with the most operations that mongotop has reported. For each hot collection, the table also displays the Utilization Percent for the collection.

Utilization Percent is calculated from the read and write times that mongotop has reported during a sample period. Specifically, the Utilization Percent is the percentage (rounded to the nearest 0.1%) of the read and write times for a collection relative to the read and write times for all collections in the deployment during the sample period. If no read and write operation occur during this period, the Utilization Percent may be 0%.

The hottest collections correspond to the most current time displayed in the charts. That is, if the display is running (not paused), the collections correspond to the hottest collections at the current timestamp. If the display is paused, the collections correspond to the hottest collections at the paused time.

Slowest Operations

Slowest operations that the db.currentOp() has reported.

The operations correspond to the most current time displayed in the charts. That is, if the display is running (not paused), the operations correspond to the slowest operations at the current timestamp. If the display is paused, the operations correspond to the slowest operations at the paused time.

Click the operation to view the detailed JSON document that db.currentOp() has reported for the operation.

Users with the Data Access Admin role can access buttons to force stop an operation or an inactive transaction in the operation details panel:

To stop a slow operation:

  1. Click the operation in the Slowest Operations pane.

  2. Click Kill Op in the Operation Details pane.

    Alternatively, click Kill Session if the operation is an inactive transaction.

  3. Click Yes, terminate this operation in the Confirm Operation modal.

To learn more about transactions, refer to the MongoDB manual.

To hide/show a metric in the graph, click the color box for the metric.

Read Exact Metrics from Graph View

If you pause the Graph view of the Real-Time Performance Panel, you can hover over a line graph to see its exact value, along with the slowest operations and hottest collections, at a given moment in time.

Stop and Restart Display

To stop the update of the metrics displayed, click Pause. Pause only stops the update of the displays and doesn’t pause the collection of the underlying data.

To restart the display updates, click Play.