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Category: Performance

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Here you can find all blog posts about the Category: Performance. You can go back to all blog posts or take a look into our other categories & tags.

PostgreSQL v12 initial query performance impressions

by CYBERTEC Guest | 11.2019
By Kaarel Moppel   With the latest major version freshly released, it’s again time to gauge its performance. I’ve already […]

Prewarming PostgreSQL I/O caches

by Hans-Jürgen Schönig | 10.2019
How to deal with PostgreSQL restarts? pg_prewarm allows you to automatically prewarm your caches after a database failure or a simple restart

How PostgreSQL estimates parallel queries

by Hans-Jürgen Schönig | 10.2019
How to understand parallel queries - estimate the cost of sequential scans and parallel sequential scans in PostgreSQL

The mysterious “backend_flush_after” configuration setting

by CYBERTEC Guest | 07.2019
By Kaarel Moppel - The "backend_flush_after" PostgreSQL server configuration parameter was introduced some time ago, in version 9.6. It has […]

PostgreSQL count(*) made fast

by Laurenz Albe | 04.2019
  It is a frequent complaint that count(*) is so slow on PostgreSQL. In this article I want to explore […]

Speeding up GROUP BY in PostgreSQL

by Hans-Jürgen Schönig | 03.2019
How to speed up GROUP BY statements in PostgreSQL. Follow some basic rules & you will squeeze performance out of the database for free.

Foreign data wrapper for PostgreSQL: Performance Tuning

by Hans-Jürgen Schönig | 03.2019
fdw performance tuning - hidden tuning options which are not widely known. Let's see how to speed up the PostgreSQL foreign data wrapper.

"LOCK TABLE" can harm your database's health

by Laurenz Albe | 03.2019
  Many people know that explicit table locks with LOCK TABLE are bad style and usually a consequence of bad […]

PostgreSQL affiliate projects for horizontal multi-terabyte scaling

by CYBERTEC Guest | 12.2018
By Kaarel Moppel: Some weeks ago I wrote about some common concepts / performance hacks related to how you can […]

PostgreSQL: Implicit vs. explicit joins

by Hans-Jürgen Schönig | 11.2018
How to use implicit and explicit joins in PostgreSQL. What are the performance differences between these two types of join?
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