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The call for sponsors for pgDay Paris 2020 is now open. There are two levels available: Partner and Supporter. The Partner level, which gives you a booth at the event, is limited to just five spots so hurry up and get yours now before it's too late!

https://2020.pgday.paris/become-sponsor/

Just now pushed new version of Pg::Explain Perl library that is handling parsing for explain.depesz.com. There have been many changes, but the short summary is: Fix display of heap fetches from json (https://gitlab.com/depesz/explain.depesz.com/issues/15) Move global data (planning/execution/total time, trigger info) from top_node to explain object itself Add method to easily get real total, wall-clock, runtime … Continue reading "New Pg::Explain and explain.depesz.com"

Postgres has extensions, and that’s awesome! Of course as the author of CREATE EXTENSION I’m a little biased… just remember that the ability to extend Postgres is way more than just this command. The whole database system has been design from the ground up to allow for extensibility. Parts of the design is to be found in the way you can register new objects at runtime: functions of course, and also data types, operators, index support structures such as operator classes and families, even index access methods!

I spent some time making an elephant logo to be used as FreeBSD boot loader logo.

I miss a proper database related newsletter for busy people. There’s so much happening in the space, from tech, to licensing, and even usage. Anyway, quick tab sweep.

We discussed one of the traditional ways to configure HAProxy with PostgreSQL in our previous blog about HAProxy using Xinetd. There we briefly mentioned the limitation of the HAProxy’s built-in pgsql-check health check option. It lacks features to detect and differentiate the Primary and Hot-Standby.

1. Overview

In the previous blog, we have discussed how to correctly set up streaming replication clusters between one master and one slave in Postgres version 12. In this blog, we will simulate a failover scenario on the master database, which causes the replica (or slave) database cluster to be promoted as new master and continue the operation. We will also simulate a failback scenario to reuse the old master cluster after the failover scenario with the help of pg_rewind.

1. Overview

PostgreSQL 12 has been considered as a major update consisting of major performance boost with partitioning enhancements, indexing improvements, optimized planner logics and several others. One of the major changes is noticeably the removal of recovery.conf in a standby cluster. For this reason, the procedure to set up a streaming replication clusters has changed, and in this blog, I will demonstrate how to properly setup a streaming replication setup in PG12.

Dalibo Labs just released yesterday the version 0.5 of PostgreSQL Anonymizer, an extension that hides sensitive information inside a PostgreSQL database.

Why do I still need pgAdmin3? As of now, pgAdmin4 does not show nested partition table in its object tree view. Since pgAdmin3 LTS repository in bitbucket by BigSQL Development Team is no longer available, I republish it in github: https://github.com/AbdulYadi/pgadmin3 with code fixes for PostgreSQL 12 internal relation field changes:

Introduction

I recently had to work on a case where a customer noticed some poor application performance after migrating from Oracle to PostgreSQL. They seemed to have tried everything in the playbook, but the problem simply wouldn’t get any better.

Photo by unsplash-logoHanna Morris Postgres Query Planning PostgreSQL provides advanced tooling to understand how it executes SQL queries. The execution of a query follows specific steps: Parsing Planning Optimization Execution When it comes to the execution step, all Postgres does is follow the selected optimized plan. It is possible to ask Postgres for the query plan and inspect it, in order to better understand the execution of any query and then when necessary find a way to execute the same query faster.

I love PostgreSQL extensions.

Extensions are the truest expression of the second principle of the original “design of Postgres” vision, to

provide user extendibility for data types, operators and access methods.

K-nearest neighbor answers the question of "What is the closest match?". PostgreSQL 12 can answer this question, and use indexes while doing it.

 

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PostgreSQL 12 is available as binary package on FreeBSD, but not in the quarterly update.

Recently we published a blog about a very simple application failover using libpq features which could be the simplest of all automatic application connection routing.  In this blog post, we are discussing how a proxy server using HAProxy can be used for connection routing which is a well-known technique with very wide deployment.

Some weeks ago, in the light of PostgreSQL v12 release, I wrote a general overview on various major version upgrade methods and benefits of upgrading in general – so if upgrading is a new thing for you I’d recommend to read that posting first. But this time I’m concentrating on the newest (available since v10) and the most complex upgrade method – called “Logical Replication” or LR shortly.

My very simple attempt at keeping PostgreSQL up-to-date on FreeBSD machines.

Installing PostgreSQL on FreeBSD via Ansible

I’m slowly moving to Ansible to manage my machines, and one problem I’m trying to solve at best is how to keep PostgreSQL up-to-date.
In the case of FreeBSD machines, pkgng is the module to use, but in the past I was used to this very simple playbook snippet: