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Aggregated Cluster Statistics

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Cluster statistics provide an interface to view data for an entire cluster at once. You can compare components dynamically across the cluster and view host-specific and aggregated data, as well as pinpoint moments in time and isolate data to specific components.


To view cluster statistics:


Select the Deployment tab and then the Deployment page.


Click view mode.


Click the name of the sharded cluster.

Ops Manager displays a chart and table with an initial set of cluster statistics. At the top of the chart, the DATA SIZE field measures the cluster’s data size on disk. For more information, see the explanation of dataSize on the dbStats page.

If Backup is enabled, hover the mouse pointer over the “clock” icon to view the time of the last snapshot and time of the next scheduled snapshot. Click the icon to view snapshots.


Select the components to display.

In the buttons above the chart, select whether to display the cluster’s shards, mongos instances, or config servers.

If you select shards, select whether to display Primaries, Secondaries, or Both using the buttons at the chart’s lower right.

The chart displays a different colored line for each component. The table below displays additional data for each component, using the same colors.


Select the data to display.

Select the type of data in the CHART drop-down list. Ops Manager graphs the data for each component individually. You can instead graph the data as an average or sum by clicking the Averaged or Sum button at the chart’s lower right.


Change the granularity and zoom.

To the right of the chart, select a GRANULARITY for the data. The option you select determines the available ZOOM options. Whenever you change the granularity, the selected zoom level changes to the closest zoom level available for that granularity.

To zoom further and isolate a specific region of data, click-and-drag on that region of the chart. To reset the zoom level, double-click anywhere on the chart.


View metrics for a specific date and time.

Move the mouse pointer over the chart to view data for a point in time. The data in the table below the chart changes as you move the pointer.


Isolate certain components for display.

To remove a component from the chart, click its checkmark in the table below the chart. To again display it, click the checkmark again.

To quickly isolate just a few components from a large number displayed, select the None button below the chart and then select the checkmark for the individual components to display. Alternatively, select the All button and then deselect the checkmark for individual components not to display.


View statistics for a specific component.

In the table below the chart, click a component’s name to display its statistics page.

If your are viewing shards, you can click the replica set name in the SHARDS column to display replica set statistics, or you can click the P or S icon in the MEMBERS column to display host statistics for a primary or secondary. Hover over an icon for tooltip information.


Change the name of the cluster.

If you want to change the name of the cluster, hover the mouse pointer over the cluster name. A pencil icon appears. Click the icon and enter the new name.