Question 114258 in PostgreSQL Question posted in
The official documentation can be found here.

Postgresql doesn't working with Citus and pg_stat_statements at the same time

So, I built the PostgreSQL with citus extension in docker.
I use the official documentation in citus, then I run this command in the terminal.

docker run -d --network citus-network --name citus_coordinator -p 5500:5432 -e POSTGRES_PASSWORD=mypassword citusdata/citus:11.1

Then Database successfully building.
But I want to create the pg_stat_statements extension.
I configuration the postgresql.conf file.

shared_preload_libraries = 'pg_stat_statements'
pg_stat_statements.track = all
pg_stat_statements.max = 10000
track_activity_query_size = 2048

Then I restarted the PostgreSQL container. Wrote the this query

SELECT * FROM pg_stat_statements;

in terminal.
I saw this error

[55000] ERROR: pg_stat_statements must be loaded via shared_preload_libraries

I didn’t understand, why the config file didn’t see this extension, What was my mistake?

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2

Answers


  1. Chosen as BEST ANSWER
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    Solved
    I am running the PostgreSQL container with postgres:latest image. Then I entered the container. So, I installed the citus from here into the container. Then installed apt-get install postgresql-contrib into the container.Next step, run create extension pg_stat_statements; And everything worked for me.


  2. 0

    If using citus, citus should always be your first shared preload library. So your postgres.conf should look like:

    shared_preload_libraries = 'citus,pg_stat_statements'
pg_stat_statements.track = all
pg_stat_statements.max = 10000
track_activity_query_size = 2048

    If you have workers, you need to change their postgresql.conf as well.

    Then you need to restart the databases (coordinator and workers) which you can achieve by:

    docker restart <container_name>

    You can confirm this worked with:

    SHOW shared_preload_libraries;
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