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Tag: query

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

Query performance of the upcoming version 11 of PostgreSQL

by CYBERTEC Guest | 10.2018
Release notes of first RC of PostgreSQL 11 didn't state any numerical query performance indicators, so we have to find it out on our own.

3 ways to detect slow queries in PostgreSQL

by Hans-Jürgen Schönig | 08.2018
How to fix bad performance in PostgreSQL - shows three useful and quick methods to spot performance problems and slow queries.

Avoiding “OR” for better query performance

by Laurenz Albe | 05.2018
  PostgreSQL query tuning is our daily bread at CYBERTEC, and once you have done some of that, you'll start […]

Using "lightweight" functional indexes - BRIN

by CYBERTEC Guest | 11.2017
When it alters columns in queries, Postgres loses statistics, and it can cause slow queries. Fix it with BRIN functional indexes.

Parallel queries and SERIALIZABLE transactions

by Hans-Jürgen Schönig | 11.2016
In version 9.6 PostgreSQL introduced parallel queries. The ability to use more than just one CPU core per query is […]

Detecting wrong planner estimates

by Hans-Jürgen Schönig | 07.2014
The PostgreSQL planner optimizes your queries, and mostly does it right. The question is: How to figure out when & where things do go wrong?

effective_cache_size: Better set it right

by Hans-Jürgen Schönig | 11.2013
effective_cache_size can have a serious impact on execution plans and change things dramatically. See what kind of difference it can make.

Speeding up “min” and “max”

by Hans-Jürgen Schönig | 09.2013
In this blog you can read why indexes are a great tool. And how it is possible speeding up a query many times by avoiding a sequential scans,
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