Did you know that your temporary tables are not cleaned up by autovacuum? If you did not, consider reading this blog post about PostgreSQL and autovacuum. If you did – well, you can still continue to read this article. Autovacuum cleans tables automatically Since the days of PostgreSQL 8.0, the database has provided this miraculous […]

Parallel queries were introduced back in PostgreSQL 9.6, and the feature has been extended ever since. In PostgreSQL 11 and PostgreSQL 12, even more functionality has been added to the database engine. However, there remain some questions related to parallel queries which often pop up during training and which definitely deserve some clarification. Estimating the […]

Many of you might have wondered why some system views and monitoring statistics in PostgreSQL can contain incomplete query strings. The answer is that in PostgreSQL, it’s a configuration parameter that determines when a query will be cut off: track_activity_query_size. This blog post explains what this parameter does and how it can be used to […]

Patroni is a cluster manager used to customize and automate deployment and maintenance of PostgreSQL HA (High Availability) clusters. It uses distributed configuration stores like etcd, Consul, ZooKeeper or Kubernetes for maximum accessibility. In this tutorial, we will be using a single local etcd instance and two local Patroni instances on a single host instead […]

Large companies and professional business have to make sure that data is kept secure. It is necessary to defend against internal, as well as external threats. PostgreSQL provides all the necessities a company needs to protect data and to ensure that people can only access what they are supposed to see. One way to protect […]

As you all may know, our main blog is a very appreciable source for various PostgreSQL-relevant guides and tips. Our PostgreSQL experts publish content about different topics – e.g. Patroni, advanced PostgreSQL features, configuration settings, security, etc. All of those posts have one thing in common: they are data- or database-centric. That’s why, that’s the […]

  In another blog post, I described how Linux control groups work and how they are useful for PostgreSQL. Here I will present my little PostgreSQL plugin pg_cgroups which makes this simple to handle for the DBA. What is pg_cgroups good for? If you have a machine dedicated to a single PostgreSQL cluster, you normally […]

Are you running PostgreSQL databases or plan to do so? Have you thought about disaster recovery? What happens if your database crashes or – more likely – the (virtual) server it runs on stops working? The best option is probably a copy of your database, that is able to take over operations, as soon as […]

  We all know that in PostgreSQL we cannot drop an object if there are view dependencies on it: Some people like it because it keeps the database consistent; some people hate it because it makes schema modifications more difficult. But that’s the way it is. In this article I want to explore the mechanics […]

In my previous post about pgBackRest, we saw how to install and setup pgBackRest and make a backup of a PostgreSQL database with it. It was a very basic single server setup,  only intended to get the hang of the tool. Such setups are not used in a production environment, as it is not recommended […]

pgBackRest is an open source backup tool for PostgreSQL which offers easy configuration and reliable backups. So if you want to protect your database and create backups easily, pgBackRest is a good solution to make that happen. In this blog, we are going to go through the basic steps of using pgBackRest for full and […]

Row Level Security (RLS) is one of the key features in PostgreSQL. It can be used to dramatically improve security and help to protect data in all cases. However, there are a couple of corner cases which most people are not aware of. So if you are running PostgreSQL and you happen to use RLS […]