Minimalistic Oracle

Minimalistic Oracle contains a collection of practical examples from my encounters with Oracle technologies. When relevant, I also write about other technologies, like Linux or PostgreSQL. Many of the posts starts with "how to" since they derive directly from my own personal experience. My goal is to provide simple examples, so that they can be easily adapted to other situations.

Friday, April 11, 2025

Solution to "ORA-12546: TNS:permission denied" when starting sqlplus

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Problem: when trying to start sqlplus, the error below is thrown: ORA-12546: TNS:permission denied Cause: Incorrect permissions on the ora...
Wednesday, April 9, 2025

How to mimic sqlplus variable behaviour in PostgreSQL

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Here is how you can mimic the usage of variables at the prompt using psql and PostgreSQL like you would with oracle and sqlplus/sqlc: \conn...
Wednesday, April 2, 2025

How to check the number of rows inserted into the different partitions in a PostgreSQL partitioned table

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Create the table: CREATE TABLE mytable ( id bigserial, key text COLLATE pg_catalog."default" NOT NULL, outdata jsonb...
Wednesday, March 5, 2025

How to manually purge your standard audit trail

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In this post I will show you how you can manage your audit trail using the package dbms_audit_mgmt. It can be used for all kinds of audit ...
Thursday, February 6, 2025

Potential solution to INS-32715 when executing runInstaller

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Error when running runInstaller: [FATAL] [INS-32715] The source home (/u01/oracle/product/19c) is not registered in the central inventory. ...
Monday, January 27, 2025

How to install and configure PG Bouncer on Linux x86_64

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Install the PGBouncer software List packages allready installed on the system: yum list installed |grep bounce Search repository: yum sea...
Friday, December 27, 2024

How to check why a PostgreSQL server won't start

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journalctl -u postgresql-15.service Example output: Dec 27 07:15:50 psl0part-prod-pgsql02.skead.no systemd[1]: Unit postgresql-15.service...
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About Me

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Name: Vegard Kåsa
My career as an Oracle DBA startet in 2001, when I acceptet a request to take on the responsibility as my current employer's DBA. From that point and onwards, managing Oracle databases has kept me busy and engaged. I enjoy my work, and particulary appreciate the constant learning and devlopment that comes with the job. From 2014, I am self-employed through my company Oric Consulting AS (Norway), and from 2024 Oric Consulting AB (Sweden) I currently live in Göteborg, Sweden, with my family.
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