Namrata,
The glide.heartbeat is a synthetic event that we inject into your event queue to monitor your instance in order to proactively ensure your instance is processing events like the event queue, text_index, metric_update or report_view (plus any custom events you create).
If a glide.heartbeat is not processed about every minute, our system is notified there might be an issue with event processing on your instance and our operations engineers can proactively check that you are not having an issue.
That's what it is and what it's for.
