Memory usage is one of the most important aspects of the database system. Having not enough memory directly affects every performance metric and negatively impacts the performance. This in turn affects our users and the business. In this blog post, we are going to understand how databases (and PostgreSQL specifically) manage memory and how to troubleshoot low free-memory scenarios.

How Databases Read Data

To understand how to deal with memory, we need to understand how things work. Let’s see some basic databases and operating systems mechanisms.

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