Uncovering the mysteries of PostgreSQL (auto) vacuum


 

Welcome to the second blog of the “magic of parameters” series. In the first entry, I covered memory parameters, and in this article. In this article will talk about PostgreSQL configuration parameters which manage the (auto)vacuum and (auto)analyze background processes.

Why vacuuming is necessary?

Before we start talking about vacuum and analyze-related parameters, we need to touch on the concept of vacuuming in PostgreSQL. This concept is Postgres-specific, and for DBAs coming from Oracle and Microsoft SQL Server it might feel confusing – you can’t directly map it to any previous experiences. (Note: both Oracle SQL Server do share some