---
title: "Crons"
description: "Sentry Crons allows you to monitor the uptime and performance of any scheduled, recurring job in your application."
url: https://docs.sentry.io/platforms/javascript/guides/azure-functions/crons/
---

# Set Up Crons | Sentry for Azure Functions

Once implemented, it'll allow you to get alerts and metrics to help you solve errors, detect timeouts, and prevent disruptions to your service.

## [Requirements](https://docs.sentry.io/platforms/javascript/guides/azure-functions/crons.md#requirements)

* Use our [getting started](https://docs.sentry.io/platforms/javascript/guides/azure-functions.md) guide to install and configure the Sentry SDK (version `7.51.1` or newer) for your recurring job.
* [Create and configure](https://sentry.io/issues/alerts/new/crons/) your first Monitor.

## [Alerts](https://docs.sentry.io/platforms/javascript/guides/azure-functions/crons.md#alerts)

When your recurring job fails to check in (missed), runs beyond its configured maximum runtime (failed), or manually reports a failure, Sentry will create an error event with a tag to your monitor.

To receive alerts about these events:

1. Navigate to **Alerts** in the sidebar.
2. Create a new alert and select "Issues" under "Errors" as the alert type.
3. Configure your alert and define a filter match to use: `The event's tags match {key} {match} {value}`.

Example: `The event's tags match monitor.slug equals my-monitor-slug-here`

Learn more in [Issue Alert Configuration](https://docs.sentry.io/product/alerts/create-alerts/issue-alert-config.md).

## [Rate Limits](https://docs.sentry.io/platforms/javascript/guides/azure-functions/crons.md#rate-limits)

To prevent abuse and resource overuse, Crons limits check-ins to **6 per minute for each monitor environment**.

For example, if you have a monitor called "database-backup" with two environments:

* `database-backup` in environment `production` can send up to 6 check-ins per minute
* `database-backup` in environment `staging` can also send up to 6 check-ins per minute
* Combined, they can send up to 12 check-ins per minute

You can verify if any check-ins are being dropped by visiting the [Usage Stats](https://docs.sentry.io/product/stats.md#usage-stats) page. To avoid dropped check-ins, ensure your monitors don't exceed the rate limit.

## Pages in this section

- [Troubleshooting](https://docs.sentry.io/platforms/javascript/guides/azure-functions/crons/troubleshooting.md)