Tag: statistics

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pg_stat_io and PostgreSQL 16 performance

by Hans-Jürgen Schönig | 10.2023
Learn about pg_stat_io's debugging power: PostgreSQL 16 blesses users around the world with many features which ensure an even better […]

Enabling and disabling autovacuum in PostgreSQL

by Hans-Jürgen Schönig | 06.2021
UPDATED August 2023: Autovacuum has been part of PostgreSQL for a long time. But how does it really work? Can […]

Estimating connection pool size with PostgreSQL database statistics

by Laurenz Albe | 02.2021
  PostgreSQL v14 has new connection statistics in pg_stat_database. In this article, I want to explore one application for them: […]

PostgreSQL: CREATE STATISTICS - advanced query optimization

by Hans-Jürgen Schönig | 02.2021
PostgreSQL query optimization with CREATE STATISTICS is an important topic. Usually, the PostgreSQL optimizer (query planner) does an excellent job. […]

PostgreSQL: ANALYZE and optimizer statistics

by Hans-Jürgen Schönig | 02.2021
Our PostgreSQL 24x7 support team recently received a request from one of our customers who was facing a performance problem. […]

Generating a normal distribution in SQL

by Hans-Jürgen Schönig | 09.2020
SQL and PostgreSQL are perfect tools to analyze data. However, they can also be used to create sample data which […]

Correlation of PostgreSQL columns explained

by Laurenz Albe | 09.2018
After you ANALYZE a PostgreSQL table to collect value distribution statistics, you will find the gathered statistics for each column […]

3 ways to detect slow queries in PostgreSQL

by Hans-Jürgen Schönig | 08.2018
(Last updated 18.01.2023) When digging into PostgreSQL performance, it is always good to know which options one has to spot […]

Detect PostgreSQL performance problems easily

by Hans-Jürgen Schönig | 02.2018
Detect PostgreSQL performance problems with ease: Is there a single significantly large and important database in the world which does […]

How a bad network configuration can cause table bloat

by Laurenz Albe | 01.2018
(Updated 2023-04-20) I recently had an interesting support case with table bloat that shows how the cause of a problem […]
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