- Ease of administration
It is a world class, performer, a scalable database that is free and open source.
At the fringes, you can have locking problems that can cause unacceptable pause, but that's really a factor of database design, and the limitations of relational databases as a technology than a particular issue with PostgreSQL
I've been using different versions of PostgreSQL for the past eight years.
There was other a foreseen issues with pushing it to the edge.
It's a very stable product.
It's easily scalable.
The amount of community support for the solution is good.
We've got experience with a number of RDBMS, but PostgreSQL has always stuck out to be the most economical and sensible product. That being said, we do have instances of Maria, and various NoSQL's floating around.
We did it in-house.