The first release of PostgreSQL was in 1989. This indefinitely and doesn't enforce any limits at all. PostgreSQL is usually installed on Linux machines and can be used to store structured and unstructured data. PostgreSQL is a great choice for organizations that need a good RDMS, already use Linux, and don't want to spend a lot of money on licensing.

The advantages of PostgreSQL are that it offers a lot of functionality, such as high availability and partitioning, it's scalable and can handle terabytes of data, and it's fast and stable. 

The disadvantages of PostgreSQL are that documentation may be harder to come by and configuration can be confusing. It also runs on Linux, and you need to know how to run commands from Command Prompt.