Dashboards

Configurable Dashboards

Memfault allows you to create multiple dashboards to visualize and group your data. You can create a dashboard for each of your different use cases, or create a dashboard for each of your teams. Configurable dashboards allow you to create a specific set of metrics that you can share with your team. You can create and duplicate dashboards from the All Dashboards page located in the left navigation bar. To open it, go to Dashboards → All Dashboards.

After creating a dashboard, you can add metric or issue charts to it. Fill up your dashboard with charts that are relevant to your team or give your team a high-level overview of your device health. For more in-depth information on how to create charts, check out the Charts page.

Overview Dashboard

The Built-in Overview Dashboard offers a selection of charts that provide an outlook of the state of your fleet at a glance. To open it, go to Dashboards → Overview.

Active Devices and Software Versions of your fleet in the Memfault Overview Dashboard.

If you alter or delete any of the charts in the Overview Dashboard, you can always restore the default version by clicking the Restore Default Dashboard button on the All Dashboards page.

Drilldown

Some charts that have a Drilldown badge on them can be clicked on sections of the chart (and sometimes also on labels) to dig into the information behind the clicked section. For example, clicking on a section in a Reboots chart will go to a filtered-down list of Devices that make up the data for that interval and reboot reason.

Clicking on this section will give you a list of devices that rebooted on November 12th due to a user reset.

Clicking on the label will give you a list of devices that rebooted on November 12th for any reason.

Chart Normalization

Chart Normalization converts absolute values such as number of incidents, sums, and counts to relative values “per 1,000 devices". This helps understanding real trends when you are comparing these values between populations of different sizes (e.g. comparing devices from large production cohort Default against those from a smaller test cohort Beta) or when the population size changes over time (e.g. new devices being activated continuously or changing Fleet Sampling resolutions).

Toggling Chart Normalization on/off

This is a global setting for all browser tabs that you can toggle in the top right corner of the page, next to the timezone selector. Additionally for convenience, each chart has a small button that allows toggling the feature globally.

Charts that support Normalization

Chart Normalization is supported on all charts that show absolute values such as number of incidents, sums, or counts. For values that are not affected by the population size (e.g. minimum, maximum, average) Chart Normalization would have no affect and the feature is unavailable.

Population and Normalized Values

The population represents the number of devices that contributed to the value. Usually, this is based on the Active Devices for the corresponding time span.

Normalized values are depicted with a suffix 1k in the bottom right corner next to the value (and are pronounced "per 1,000 devices"). Examples:

• 42₁ₖ means “42 per 1,000 devices”
• 3K₁ₖ means "3,000 per 1,000 devices".

To calculate the normalized value ($Norm$) from the absolute value ($Real$) and a given population ($Pop$) use the following formula:

$$Norm=Real\times \frac{1000}{Pop}$$

For the values in the screenshot above that translates to:

$$63\textup{M}_{1\textup{k}}=2.2\textup{B} \times \frac{1000}{35\textup{K}}$$

Examples of Chart Normalization

Comparing Values Between Cohorts

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If you're interested in seeing an all-time comparison between multiple Cohorts or multiple Software Versions, use Metric Charts by Cohort or Software Version.

Without Chart Normalization (left): Cohort A (blue) reported more than 10x the duration spent charging compared to cohort B (purple). But in reality, both cohorts have a growing population with Cohort A consisting of 13,000 devices and Cohort B of only 1,000 devices.

Relatively speaking, the time spent charging stayed the same at about 60M₁ₖ.

Population Changes

Two weeks ago, the fleet reported 36K reboots per day steadily growing towards 130K daily reboots. It looks like the devices started to reboot more often. But in reality, the population grew from 10K devices to 36K devices during the same time span (as more people unpacked devices).

Relatively speaking, the number of reboots stayed the same at about 3.6₁ₖ.

Layout Mode

After building your charts, you can use the Layout Mode to rearrange them in a way that makes sense to you. To enter the Layout Mode, click the Layout Mode toggle on the top-right corner of the page.

Inside the Layout Mode, you can drag and drop the charts to rearrange them. You can also resize the charts by dragging the right corner of the chart. To exit the Layout Mode, click the Layout Mode toggle again and the changes will be saved.

Filtering Charts

You can filter the values visible in the charts by selecting from the available filters in the top area of the page:

These filters can be saved, by clicking the Save for Everyone button. As the name suggests, this will change the filters for everyone in the Organization viewing the Dashboard.

You can change the filters and get back to the saved version by clicking Reset.

Comparison Mode

To compare the data from different sets of Devices, you can click the Compare button next to the filters section on the top-right area of the page to add a new colorized selection to the filters as well as the charts:

When comparing Metric and Issue Charts, bear in mind that the aggregations Count and Sum lead to absolute values that are a function of the number of Devices reporting the given value. When visualizing absolute values for different sets of Devices, the resulting chart could be misleading as the underlying number of Devices per set may vary.

Comparisons can also be saved with the Save for Everyone button, and changes can be undone via the Reset button.