Preserve optimizer statistics during major upgrades with PostgreSQL v18
by
Laurenz Albe |
06.2025© Laurenz Albe 2025 Everybody wants good performance. When it comes to the execution of SQL statements, accurate optimizer statistics […]
SELECT FOR UPDATE considered harmful in PostgreSQL
by
Laurenz Albe |
06.2025© Laurenz Albe 2025 Recently, while investigating a deadlock for a customer, I was again reminded how harmful SELECT FOR […]
The Fun of Open Source: Roman Numerals in PostgreSQL
by
Laurenz Albe |
06.2025© Laurenz Albe 2025 Recently, I wrote about the power of open source. Now, power is good and important, but […]
Orphaned files after a PostgreSQL crash
by
Laurenz Albe |
04.2025This article describes how a PostgreSQL crash can leave some orphaned files behind and what you can do to get rid of them.
Type alignment and padding bytes: how to not waste space in PostgreSQL tables
by
Laurenz Albe |
04.2025Learn the concepts of data type alignment and padding bytes in PostgreSQL and how to define your table so that you don't waste storage space.
Swiss Database Synergy Day 2025: Oracle and PostgreSQL User Groups Unite
by
Laurenz Albe |
04.2025My impressions from the Swiss Database Synergy Day 2025, a conference organized by the Swiss Oracle and PostgreSQL user groups
stats_fetch_consistency: caching PostgreSQL monitoring statistics?
by
Laurenz Albe |
03.2025This article describes the little known parameter stats_fetch_consistency and its potential applications for statistics collection.
Comparison of the transaction systems of Oracle and PostgreSQL
by
Laurenz Albe |
02.2025This article offers a comparison between the transaction systems of Oracle and PostgreSQL to help you spot potential migration problems.
Dealing with the PostgreSQL error "found xmin ... from before relfrozenxid ..."
by
Laurenz Albe |
02.2025This article explains the error message "found xmin ... from before relfrozenxid ..." and shows how you can fix the problem.
commit_delay for better performance: a PostgreSQL benchmark
by
Laurenz Albe |
01.2025We benchmark the performance boost that you can get by tuning commit_delay with a workload of small transactions.
