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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.

Reducing log messages on the client

by Hans-Jürgen Schönig | 06.2014
Frequently PostgreSQL client applications are flooded with log messages from the server. Correct this by changing the server configuration.

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 […]

wal_level: What is the difference?

by Hans-Jürgen Schönig | 03.2014
PostgreSQL replication requires changing the wal_level from “minimal” to “hot_standby”. What er the impacts? Read out more.

Logging - the hidden speedbrakes

by Hans-Jürgen Schönig | 03.2014
When it comes to performance, people tend to forget some basic topics entirely. One of those topics is the impact of writing log files.

max_connections - Performance impacts

by Hans-Jürgen Schönig | 03.2014
Setting max_connections to an insanely high value is not good for performance. I tried it, to see what impact it has in PostgreSQL.

Adjusting maintenance_work_mem

by Hans-Jürgen Schönig | 02.2014
After testing shared_buffers recently, I decided to do a little more testing on our new office desktop PC (8 core […]

PostgreSQL 9.3 - Shared Buffers Performance (1)

by Hans-Jürgen Schönig | 02.2014
A lot has been said about PostgreSQL shared buffers and performance. As my new desktop box has arrived this week […]

Security barriers: Cheating on the planner

by Hans-Jürgen Schönig | 12.2013
UPDATED Aug. 2023 - How a security barrier can theoretically be used to speed up PostgreSQL queries and to see how PG works under the hood.

Detecting table bloat in PostgreSQL

by Hans-Jürgen Schönig | 08.2013
If your PostgreSQL database is purely maintained (lack of VACUUM) or badly structured, you might face some table bloat. UPDATE […]

Functions: The most widely ignored performance tweak

by Hans-Jürgen Schönig | 05.2013
A PostgreSQL function performance can be marked as follows: VOLATILE, STABLE, IMMUTABLE or [NOT] LEAKPROOF. Undestand why.
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