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PostgreSQL 9.0 High Performance by Gregory Smith

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Chapter 1. PostgreSQL Versions

PostgreSQL certainly has a reputation. It's known for having a rich feature set and very stable software releases. The secure stance which its default configuration takes is simultaneously praised by security fans and criticized for its learning curve. The SQL-specification conformance and data integrity features allow only the strictest ways to interact with the database, which is surprising to those who come from a background working with looser desktop database software. All of these points have an element of truth to them.

Another part of PostgreSQL's reputation is that it's slow. This too has some truth to it, even today. There are many database operations where "the right thing" takes longer to do than the alternative. ...

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