On August 22, 2026, starting around 12:00 UTC, one shared shard in the us-west-2 cloud environment experienced elevated database CPU and elevated scheduling latency. A high volume of concurrent workflow runs with stacked concurrency controls caused lock contention and delayed task processing for tenants on that shard.
Other shared shards in us-west-2, shared environments in other regions, and dedicated customer shards were not affected.
Took steps to throttle the workload and reduce co...