How to implement in Grafana an alert that sends an email notification if responses take more than one second?

To set up an alert in Grafana for response delays over 1 second and send notifications via email, you need to:

1. Create a panel with a metric measuring response time (for example, using Prometheus and the metric http_request_duration_seconds).
2. In the Alerting section, create a new alert rule with a condition such as:

WHEN avg() OF query(A, 5m, now) > 1

where query(A) is a query returning the response time.

3. Configure a notification channel with the Email type and specify recipient addresses.
4. Link this channel to the alert rule.

After that, if the average response time over the last 5 minutes exceeds 1 second, Grafana will send an email to the specified address.