Many of you out there using PostgreSQL streaming replication might wonder what this hot_standby_feedback parameter in postgresql.conf really does. Support customers keep asking this question, so it might be useful to share this knowledge with a broader audience of PostgreSQL users out there. What VACUUM does in PostgreSQL VACUUM is an essential command in PostgreSQL […]

Sorting is a very important aspect of PostgreSQL performance tuning. However, tuning sorts is often misunderstood or simply overlooked by many people. So I decided to come up with a PostgreSQL blog showing, how sorts can be tuned in PostgreSQL. Creating sample data To show how sorting works, I created a couple of million rows […]

UPDATED 26.04.2022: When digging into PostgreSQL performance, it is always good to know which options one has to spot performance problems, and to figure out what is really happening on a server. Finding slow queries in PostgreSQL and pinpointing performance weak spots is therefore exactly what this post is all about. There are many ways […]