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.

Thursday, January 31, 2019

How to solve SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled

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Logged in as the user owning the objects, you are getting the following error when trying to use the autotrace feature: SP2-0618: Cannot ...

last - show listing of last logged in users

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A potentiall very useful tool when investigating what really happened, is the command "last". Here is an abbrivated output: ro...

The shell variable HISTTIMEFORMAT and the "history" command

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If you need to investigate the history of commands on your linux/Unix server, set the HISTTIMEFORMAT parameter first: HISTTIMEFORMAT=...
Wednesday, January 30, 2019

How to solve "User "superuser" has an expired password" in postgreSQL

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psql psql (11.2) Type "help" for help. postgres=# alter role superuser valid until 'infinity'; ALTER ROLE

How to find the log file for a PostgreSQL database

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Look in the file $PGDATA/postgresql.conf: #------------------------------------------------------------------------------ # REPORTING AN...

How to check the status, stop and start a postgreSQL server

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The postgreSQL server comes with a wrapper called pg_ctl which will simplify some admin tasks for you. Check if the variable PGDATA is se...
Tuesday, January 29, 2019

The difference between REDO and UNDO

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UNDO REDO Used during normal database operations Used during instance and media recovery only Contains changed column values Conta...
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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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