Re: Creating a TABLESPACE

[Amn Ojee Uw]

Yes!
Thank you Mateusz.

On 8/16/23 6:43 a.m., Mateusz Henicz wrote:

Hey,
You are using "WITH tablespace_option" wrong.

Try it like this:

postgres=# CREATE TABLESPACE jme_tablespace OWNER jamiil LOCATION '/database' WITH (seq_page_cost=1.0,random_page_cost=4.0,effective_io_concurrency=1);

CREATE TABLESPACE

Cheers,
Mateusz

śr., 16 sie 2023 o 12:10 Amn Ojee Uw <amnoje...@gmail.com> napisał(a):

    Hello children!

    I am learning how to create a tablespace, and AFAIK this are the
    steps to follow.

    First step is to create the directory where the database files
    will be created, for that I am using the root directory
    '/database'. This directory is be owned by the postgres group.

    Example :
    sudo mkdir /database
    sudo chown postgres:postgres /database

    I read the following documentation
    1.) TABLESPACE
    <https://www.postgresql.org/docs/current/sql-createtablespace.html>

    2.) seq_page_cost
    
<https://www.postgresql.org/docs/current/runtime-config-query.html#GUC-SEQ-PAGE-COST>

    3.) effective_io_concurrency
    
<https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-EFFECTIVE-IO-CONCURRENCY>

    4.) maintenance_io_concurrency
    
<https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-MAINTENANCE-IO-CONCURRENCY>

    5.) Tablespaces
    <https://www.postgresql.org/docs/current/manage-ag-tablespaces.html>

    x.) effective_io_concurrency
    <https://manpages.debian.org/testing/manpages-dev/posix_fadvise.2.en.html>

    I then login PostgreSQL as so : sudo -u postgres psql.

    Note : _/*jamiil*/_ is an actual account, it does exist!

    I proceed to create the 'TABLESPACE' using the default values in
    PostgreSQL

    CREATE TABLESPACE jme_tablespace OWNER jamiil LOCATION '/database'
    WITH tablespace_option = seq_page_cost(1.0), random_page_cost
    (4.0), effective_io_concurrency (1), maintenance_io_concurrency (10);

    But then I get this error message:
    *ERROR:  syntax error at or near "tablespace_option"**
    **LINE 1: ...tablespace OWNER jamiil LOCATION '/database' WITH
    tablespace...*

    What did I go wrong?

    This exercise is not imperative, but as a student of PostgreSQL
    I'd like to try all there is to learn about PostgreSQL.

    Thanks in advance for your time and interest.