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Laurenz Albe

Senior Consultant & Support Engineer
Laurenz Albe is a senior consultant and support engineer at CYBERTEC. He has been working with and contributing to PostgreSQL since 2006, has written patches for core, and wrote oracle_fdw. He holds a Master's degree in Mathematics from the University of Vienna and a Master's in Computer Science from the Technical University of Vienna. In his spare time he enjoys reading to his children and pondering the roots of language.
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Articles by Laurenz Albe

Tuning max_connections in PostgreSQL

by Laurenz Albe | 04.2020
  (Updated 2023-02-22) In my daily work, I see many databases with a bad setting for max_connections. There is little […]

Embedded SQL in C for PostgreSQL with ecpg

by Laurenz Albe | 03.2020
  Embedded SQL is by no means a new feature — in fact it is so old-fashioned that many people […]

Subtransactions and performance in PostgreSQL

by Laurenz Albe | 03.2020
  (Last updated on 2023-01-24) Recently, while troubleshooting PostgreSQL performance problems, I ran into problems with subtransactions twice. So I […]

recovery.conf is gone in PostgreSQL v12

by Laurenz Albe | 12.2019
  The biggest change in PostgreSQL v12 from the viewpoint of backward compatibility is that recovery.conf has been absorbed into […]

B-tree index improvements in PostgreSQL v12

by Laurenz Albe | 11.2019
  If you thought that the B-tree index is a technology that was perfected in the 1980s, you are mostly […]

Never lose a PostgreSQL transaction with pg_receivewal

by Laurenz Albe | 10.2019
    “Durability”, the D of ACID, demands that a committed database transaction remains committed, no matter what. For normal […]

Manage Linux control groups in PostgreSQL with pg_cgroups

by Laurenz Albe | 09.2019
(This article and the extension pg_cgroups was written for cgroups v1. The extension won't work with cgroups v2, but the […]

Tracking view dependencies in PostgreSQL

by Laurenz Albe | 09.2019
  We all know that in PostgreSQL we cannot drop an object if there are view dependencies on it: [crayon-66eb7e1bdaa79095849848/] […]

ICU collations against PostgreSQL data corruption

by Laurenz Albe | 07.2019
  (Updated 2023-07-18) This article was prompted by version 2.28 of the GNU C library, which changed the definition of […]

Abusing SECURITY DEFINER functions in PostgreSQL

by Laurenz Albe | 05.2019
UPDATED August 2023: Functions defined as SECURITY DEFINER are a powerful, but dangerous tool in PostgreSQL. The documentation warns of […]
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