Creating a TABLESPACE

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&gt;

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

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

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

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

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

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.

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 <amnojeeuw@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&gt;

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

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

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

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

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

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.

On 8/16/23 11:37 a.m., Ron wrote:

Friendly tip: whatever else you do, don't write "Hello children!" in
English to adults.  It's *highly insulting*.

On 8/16/23 05:10, Amn Ojee Uw wrote:

Hello children!

--
Born in Arizona, moved to Babylonia.