Final Notice: Update to PostgreSQL Replication Mode

Update timeline

1. scheduled Apr 21, 2026, 04:58 PM UTC

   As communicated in an email notification earlier this year, we are finalizing the retirement of the legacy SYNCHRONOUS replication mode. To ensure continued stability, all remaining PostgreSQL clusters will be automatically migrated during their first scheduled maintenance window after May 4, 2026. What is changing? - Automatic Migration: Your cluster will be transitioned to ASYNCHRONOUS mode. - Impact: You will experience a brief restart during the maintenance window. While you may see improved write performance, please note that ASYNCHRONOUS mode prioritizes speed over strict data acknowledgment. Action Required for Strong Consistency If your workload requires a zero-data-loss guarantee, you must manually upgrade to STRICTLY_SYNCHRONOUS via the API no later than May 1, 2026: - Scale Replicas: Increase your cluster to 3 or more replicas. - Update API: Set the synchronization mode to STRICTLY_SYNCHRONOUS. Affected services: Database as a Service (DBaaS) Location: Global Services

2. in progress May 01, 2026, 08:00 AM UTC

   Scheduled maintenance is currently in progress. We will provide updates as necessary.

3. completed May 04, 2026, 08:00 AM UTC

   The scheduled maintenance has been completed.