In this blog, we continue our exploration on PostgreSQL indexes which we started here. In that article, we learned what an index is, and how exactly indexes can help with query execution. But there is much more to learn about indexes! In this blog, we will keep exploring B-tree indexes. We will learn whether (and … Read more
In the previous blog in this series, we learned how to produce, read and interpret execution plans. We learned that an execution plan provides information about access methods, which PostgreSQL use to select records from a database. Specifically, we observed that in some cases PostgreSQL used sequential scan, and in some cases index-based access. It … Read more
In the last blog (When PostgreSQL Parameter Tuning is not the Answer), we compared several execution plans for a SQL statement as we made changes to parameters and indexes. Still, there was no mention of what an execution plan is, how one can obtain an execution plan for a query, and how to interpret the … Read more
