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While losing to Oracle in features, it's losing marginally. While not so long on the market, it's still second best. While not so funky and shiny like new NoSQL DBs, it's arguably most shiny of all relational DBs and it has a colourful history. So, let me tell you about Postgresql architecture and internals, walk you through query path and optimization, let me hint about no hinting and how and why, in another thread we'll talk about MVCC and vacuum and if there will be time for more, we'll have a round of questions.