Delayed CloudWatch Metrics

11:55 AM PST We can confirm increased delays for CloudWatch log event processing for metric filter extraction and log subscriptions in the EU-WEST-1 Region. CloudWatch alarms may transition into "INSUFFICIENT_DATA" state if set on metrics extracted using log filters. We are are working towards resolution.

12:49 PM PST We can confirm increased delays for CloudWatch log event processing for metric filter extraction and log subscriptions in the EU-WEST-1 Region. CloudWatch alarms may transition into "INSUFFICIENT_DATA" state if set on metrics extracted using log filters. We have isolated the likely root cause to a subsystem that saw an unexpected jump in resource consumption. We continue to work towards resolution.

1:52 PM PST We have implemented a fix to address the CloudWatch log event processing delays in the EU-WEST-1 Region and are starting to see signs of recovery. We will provide an update once full recovery has been observed.

2:56 PM PST Between 10:26 AM and 02:40 PM PST, we experienced increased delays for CloudWatch log event processing for metric filter extraction and log subscriptions in the EU-WEST-1 Region. This was due to a subsystem that saw an unexpected jump in resource consumption. The issue has been resolved and the service is operating normally. New events are processing as normal, while we work through the message backlog. We expect to completely drain the backlog over the next 1 hour.