Sending delays for event-triggered flows

Event timeline

How this incident unfolded, from the official status page.

1. Investigating

   about 1 month ago

   Klaviyo

   We are currently investigating a delay in the sending of event-triggered flows. Some customers may see these flows send later than expected. Scheduled campaigns and other areas of Klaviyo are not affected. We will share another update as soon as we have more information.

2. Investigating

   about 1 month ago

   Klaviyo

   We are continuing to investigate the delays affecting event-triggered flows. Some customers may see these flows send with delays of approximately 90 minutes while we work to restore normal performance. We will provide another update shortly.

3. Identified

   about 1 month ago

   Klaviyo

   We have identified the cause of the delays affecting event-triggered flows. Affected flows may see delays of approximately 2 hours. Our team is now working on a fix to restore processing back to normal speed. We are working to resolve this as quickly as possible and will share another update shortly.

4. Identified

   about 1 month ago

   Klaviyo

   Our team is continuing to implement a fix to mitigate the delays affecting event-triggered flows. Delays to affected flows remain at approximately 2 hours. We are working to resolve this as quickly as possible and will share another update shortly.

5. Monitoring

   about 1 month ago

   Klaviyo

   Event-triggered flow processing is recovering, and our systems are now working through the backlog of delayed messages. Delayed messages will continue to send automatically as the backlog clears. A fix has been deployed and system performance is improving. We continue to monitor closely and appreciate your patience throughout this incident.

6. Resolved

   about 1 month ago

   Klaviyo

   The backlog of delayed event-triggered flows has been fully processed and all systems are now operating normally. We apologize for the disruption this caused. This incident has been resolved.