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Set up alerts

You can set up alerts for Imply Polaris to monitor events in your data. An alert monitors for when one or more measures match configurable conditions. You can choose how you want to be notified when an alert gets triggered, and set the recipients for these notifications.

Polaris uses the alert configuration to query the specified data cube and filter the data. It then evaluates your specified conditions against the query results, to determine when to trigger the alert.

Alerts are based on your own datafor example, you could trigger an alert when revenue drops by a specified percentage.

You can have a maximum of 100 active alerts in a project. If you restrict alert access to specific users, a user might encounter the alert limit even if they can't see all 100 active alerts.


Users with AdministerAlerts or ManageAlerts permissions assigned to their profile can schedule alerts in Polaris. For information on permissions that control who can access and manage reports, see Permissions reference.

Users additionally need the ManageAlertsWebhooks permission to set up or modify webhooks for an alert.

Create an alert

Follow these steps to create an alert:

  1. Click Alerts in the left pane, then click New alert:

    Set up alert

    You can also create an alert from a data cube. Click the Alerts and reports ellipsis in the top right corner of the page, then select Set up alert.

  2. Configure alert options, then click Access options.

  3. Manage access to the alert and then click Set up webhooks, or click Set up webhooks if you want to accept the access defaults.

  4. Set up a webhook and then click Create alert, or click Create alert to save the alert without a webhook.

Configure alert options

The following table lists all of the options you can configure for an alert:

Alert nameThe name of the alert. The name appears on the Alerts page, and in emails and webhook notifications.
SeveritySelect a severity from the following options: Info, Warning, Error, OK. The severity you select affects the alert's color and icon in the Polaris UI.
Data cubeSelect the data cube that contains data you want the alert to monitor.
Check everyDefines how often Polaris evaluates alert criteria. You can select a predefined length of timefor example, Minute, Hour, Dayor enter a custom value. Polaris uses the ISO 8601 duration format to describe time intervals. For example, you can define a 12-hour period with the string PT12H or a 2-month period with the string P2M.
You can restrict the options available to most users by setting a Minimum alert frequency in the data cube's properties.
Time frameControls the amount of data Polaris considers when evaluating the alert criteria based upon a time interval. Setting this field to Day, for instance, results in the alert querying data for the previous day (defined from the moment the alert is evaluated). It's best practice to make Time frame greater than or equal to Check every, so that your alert doesn't skip events. By default, Time frame and Check every are equal.
You can restrict the options available to most users by setting a Minimum alert timeframe in the data cube's properties.
Latest data strategy overrideOverrides the latest data strategy setting for the Data cube and determines how Polaris calculates the latest data time for the alert:
  • Inherit from data cube: Default setting.
  • Query the latest timestamp from the data source: Set the latest data time to the latest data timestamp.
  • Use the current time: Set the latest data time to the current time. Use this option to trigger an alert when no new data has been ingested.
FiltersYou can define one or more filters to restrict the alert data Polaris gathers during alert evaluation. Select from the list of dimensions for your chosen data cube. Polaris then presents further options based on the dimension type, such as whether to include or exclude your chosen values.
Look atDetermines the data Polaris evaluates the alert criteria against.
  • Overall values: Evaluate against all data the alert query returns.
  • Dimension values: Evaluate against values in a specified dimension. Select a dimension, and set Sort by and Limit values.
ComparisonSelect a predefined comparison period, such as 1 week back or enter a custom value.
Select None if you want the alert to trigger based or an absolute condition, such as when a certain measure is greater than a particular value. To trigger the alert when a measure changes by a certain value, specify a comparison period and then set a Condition.
ConditionsSpecify one or more conditions to trigger your alert. Click the All conditions or Any conditions tab to define whether all, or at least one, condition must be met.
  • Measure: Select the measure to which your condition applies.
  • Condition: Select an operator and a value to apply to your condition. If you selected a time period in the Comparison field, select Percent delta, Delta, or Value.
  • Percent delta and Delta allow you to define an alert threshold relative to the time period you’re comparing against. For example, you could set Delta to -10 to trigger the alert when the number of events in your data decreases by 10, or you could set Percent delta to trigger the alert when the number of events in your data decreases by 10%.

Preview shows how many times the alert would have triggered based on existing data. The active alert may trigger more or less often depending on your live data. The actual frequency of minute-level alerts may be lower than projected due to real-world conditions.

Manage access

By default, all project users can view a newly created alert. The alert creator and users with the AdministerAlerts or ManageAlerts permission assigned to their profile can edit the alert.

You can configure access to an individual alert at a more granular level when you create or edit an alert:

  1. Click the Access tab.
  2. Click Add people.
  3. Select one or more users and groups from the drop-down lists for the following access levels:
  • Can view: View the alert. Users with this access level also need the AccessAlerts permission assigned to their profile.
  • Can edit: View and edit the alert. Users with this access level also need the ManageAlerts or AdministerAlerts permission assigned to their profile.
  1. Check the Email checkbox to send an email to the recipient each time the alert triggers. If you don't check the email box, recipients don’t receive an email notification but they can see the alert and its occurrences in the Polaris UI. See Example alert email for more information.

    In cases where different permissions on the individual level and the group level apply to the same user, Polaris applies the most privileged permission. For example, if an individual user has Can view access to an alert, but they are a member of a group with Can edit access, they can edit the alert.

  2. Optional: You can enter a comma-separated list of external email addresses to receive alert emails in the Webhooks configuration section.

Example alert email

Polaris sent the following example email when an alert was triggered:

Alert email

Polaris alert emails automatically include the X-Auto-Response-Suppress: All header to suppress replies to email messages.

Set up a webhook

Webhooks enable notifications about triggered alerts by a third-party service. Polaris supports Slack and custom webhooks. You can set up a webhook when you create or edit an alert.

To set up or modify an alert's webhooks, you need the ManageAlertsWebhooks permission assigned to your user profile.

Configure a Slack webhook

You can configure a Slack webhook with a predefined payload or configure a custom payload. To customize the payload for a webhook, follow the steps in Configure a custom webhook.

Use the predefined payload

Follow these steps to create a Slack webhook URL for Polaris alerts with a predefined payload:

  1. Follow steps 1-3 of the Getting started with incoming webhooks Slack doc to generate a webhook URL.

  2. In your alert configuration, click Create one in the Webhook section and select Slack as the Type.

  3. Copy and paste your Slack webhook URL into the URL field:

    Slack webhook

  4. Click Send test notification to test the connection, then click OK to save.

An example Slack payload is as follows:

"attachments": [
"fallback": "Alert was triggered",
"color": "#038ADC",
"title": "Alert was triggered",
"title_link": "/pivot/d/6e7aacc0d0cf2644d8",
"text": "Hourly alert",
"ts": 1683557493

Configure a custom webhook

Follow these steps to create a custom webhook for a Polaris alert:

  1. In your alert configuration, click Create one in the Webhook section and select Custom as the Type.
  2. Enter your webhook integration URL in the URL field (you must generate this in your third-party application).
  3. If you want to use an Authorization Header, check the box and enter your authorization string. Polaris outputs the header in the following format:
    Authorization: [your webhook auth header definition]
  4. Modify the payload as required. See an example payload below.
  5. Click Send test notification to test the connection, then click OK to save.

An example custom payload is as follows:

"attachments": [
"fallback": "\"Wikipedia\" alert was triggered",
"color": "#038ADC",
"title": "\"Wikipedia\" was triggered",
"title_link": "/pivot/d/6e7aacc0d0cf2644d8",
"text": "Hourly Wikipedia alert",
"summaryData": [
"summary": "Hourly Wikipedia alert",
"currentValue": "2",
"previousValue": "1",
"rawDelta": "1",
"percentDelta": "100%",
"measureTitle": "Number of Events",
"conditionTriggerValue": 1,
"type": "percent-delta",
"condition": "greaterThan",
"triggered": true
"ts": 1683557493,
"footer": "Sent by Imply",
"footer_icon": "",
"checkFrequency": "Hour",
"timeFrame": "Hour ending at May 8th 2023, 2:51 pm"

Manage alerts

You can click the ellipsis to the right of the alert name on the Alerts page to manage an alert.

Select the corresponding option to edit, duplicate, or delete the alert, toggle its active status, or add the alert to a collection. Click the star icon on the right side of the alert's row to add it to your favorites.

View alert history

Click Alerts in the left pane to view the alerts page, and click the name of an alert to view its history page.

The history page shows when the alert was triggered, alert conditions, and the value of the data. You can also analyze the alert data in a data cube.

Unmet evaluations

You can view the history of times Polaris evaluated alert criteria but didn't trigger the alert because not all criteria were met.


Before you can view unmet evaluations, Imply must enable the feature for you. Contact Polaris support to request the feature.

Click Show x unmet alert evaluations on an alert's history page and click More info next to an unmet evaluation.

The following example shows that Example alert triggered at 2.08 AM. The number of events was 282 which met the alert criteria of more than 250 events. The alert was also evaluated at 2.07 AM but the number of events was 214 so the alert wasn't triggered.

Alert history

Learn more

See the following topics for more information: