Tag: execution plan

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EXPLAIN that parameterized statement in PostgreSQL!

by Laurenz Albe | 11.2022
  For detailed query performance analysis, you need EXPLAIN (ANALYZE, BUFFERS) output for an SQL statement. With a parameterized statement, […]

How to interpret PostgreSQL EXPLAIN ANALYZE output

by Laurenz Albe | 05.2021
  UPDATED July 2023: EXPLAIN ANALYZE is the key to optimizing SQL statements in PostgreSQL. This article does not attempt […]

PostgreSQL: Speeding up GROUP BY and joins

by Hans-Jürgen Schönig | 12.2017
A couple of weeks ago I have seen a horribly designed, 370 billion (with a “b”) row Oracle database monster […]

The power of response times and execution time

by Hans-Jürgen Schönig | 04.2014
The goal of the PostgreSQL optimizer is to provide you with a plan, which executes as fast as possible and […]

effective_cache_size: Better set it right

by Hans-Jürgen Schönig | 11.2013
PostgreSQL knows a parameter called effective_cache_size. To many this is one of the most mysterious settings in the entire PostgreSQL […]
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