Chapter 2. Preparing
Before you get to the installation process of PostgreSQL, let's take a look at the basic software and hardware requirements of PostgreSQL databases. PostgreSQL is a very slim database system and therefore does not require a lot of system resources.
In contrast to many other databases, such as Oracle, PostgreSQL is designed to run even on very slow machines that provide only a few megabytes of memory. This does not mean that PostgreSQL does not perform well on strong machines. Depending on the machine you want to run PostgreSQL on, the database system can be tuned very effectively to reach maximum performance.
The minimum amount of memory available cannot be evaluated because it is hardware- and compiler-dependent. ...