3rd October 2019: PostgreSQL 12 Released!

Feature Description

Synchronous replication

This allows the primary to wait for a standby to write the transaction information to disk before acknowledging the commit. One standby at a time can take the role of the synchronous standby, as controlled by the synchronous_standby_names setting. Synchronous replication can be enabled or disabled on a per-transaction basis using the synchronous_commit setting.