AlloyDB Hot Standby: Faster failovers, consistent performance

AlloyDB introduces Hot Standby, a new high availability architecture that enables faster failovers and consistent performance by keeping the standby node actively replicating.

• •Hot Standby transforms the standby node from passive to active, continuously applying WAL records from the primary to keep it synchronized
• •Failover time is dramatically reduced to approximately 15 seconds since PostgreSQL is already running and initialized on the standby
• •Memory caches on the standby remain 'warm' with frequently accessed data, enabling optimal performance immediately after failover
• •The new architecture eliminates the post-failover performance 'brownout' period typically seen while caches warm up from disk
• •This enhancement is available at no additional cost and is being rolled out to newly created AlloyDB instances in PostgreSQL 18