Azure Database for PostgreSQL – Flexible Server is the next generation managed PostgreSQL service in Azure which provides maximum flexibility over your database, built-in cost-optimizations, and offers several improvements over Single Server. We highly recommend you migrate to Flexible Server to have the best experience of running PostgreSQL workloads on Azure. The new migration feature includes a seamless, inline experience to migrate your Single Server to Flexible Server. Currently this feature supports fast offline migrations; support for online migrations will be introduced at a later point in time. Offline migrations are ideal for databases of size less than 100 GB since the entire migration can be completed in less than an hour if best practices are followed.
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