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Outage in Optimizely

Degraded Snippet Publishing Performance

Resolved Minor
October 15, 2026 - Started 13 days ago - Lasted about 3 hours
Official incident page

Incident Report

Summary AI Generated

Optimizely experienced a 3.1-hour degradation in snippet publishing performance, where a surge in upload activity created a processing queue backlog, causing deployments to remain stuck in an "Uploading to CDN" state longer than expected. Snippet Building was the affected component, though existing live experiences continued to serve normally throughout the incident. The backlog was cleared and publishing returned to normal processing times upon resolution.

We are investigating an issue causing delays when publishing experiments and other changes. Customers may see deployments remain in an "Uploading to CDN" state longer than expected before becoming available. Existing experiences continue to serve normally. Our engineering team is actively investigating the cause and working to restore normal publishing times.
Components affected
Optimizely Snippet Building

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Latest Updates ( sorted recent to last )
RESOLVED 13 days ago - at 10/15/2026 01:39PM

We have resolved the issue that caused delayed publishing and extended "Uploading to CDN" times for some customers. Publishing requests are now processing normally. The issue was caused by a temporary backlog in snippet upload processing, which has been cleared. We apologize for the disruption and appreciate your patience while we worked to restore service. Existing experiences remained available throughout this issue.

IDENTIFIED 13 days ago - at 10/15/2026 12:00PM

We have identified the cause of the delayed publishing issue. A surge in snippet upload activity created a backlog in our processing queue, which resulted in extended "Uploading to CDN" times for some customers. Mitigation actions have been taken to stop the source of the backlog, and our engineering team is actively working to restore normal processing times. Existing experiences continue to operate normally. We are closely monitoring recovery and will provide further updates as progress continues.

INVESTIGATING 13 days ago - at 10/15/2026 10:35AM

We are investigating an issue causing delays when publishing experiments and other changes. Customers may see deployments remain in an "Uploading to CDN" state longer than expected before becoming available. Existing experiences continue to serve normally. Our engineering team is actively investigating the cause and working to restore normal publishing times.

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