Now that we've covered an introduction to PostgreSQL 13, we want to focus our attention on the next important topic. Locking is a vital concept for any kind of database. It is not enough to understand just how it works to write proper or better applications—it is also essential from a performance point of view. Without handling locks properly, your applications might not only be slow; they might also behave in very unexpected ways. In my opinion, locking is the key to performance, and having a good overview of this will certainly help. Therefore, understanding locking and transactions is important for administrators and developers alike. In this chapter, you will learn about the following topics:
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