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, June 19, 2020

How to run RMAN with debug information

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Tested with Oracle 12.2 For example, to trace a duplicate database session, I have put the following into a file called "run_duplica...
Wednesday, May 13, 2020

How to use the TIMESTAMP_TO_SCN function

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select timestamp_to_scn(to_timestamp('2020-05-11 14:36:22', 'YYYY-MM-DD HH24:MI:SS')) "scn" from dual; s...
Tuesday, May 12, 2020

How to avoid the error Can't locate Data/Dumper.pm in @INC during installation of AHF

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During installation of ahf, I received the following error: Extracting AHF to /u01/ahf/oracle.ahf Can't locate Data/Dumper.pm in @IN...
Tuesday, April 21, 2020

Potential solution to ORA-1033 during configuration of standby database in data guard broker

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In my environment, the following message was displayed in dgmgrl when trying to configure a data guard environment: DGMGRL> add databa...
Friday, April 17, 2020

How to use mkstore to set up passwordless duplication

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Oracle provides a method called " Secure External Password Store " to hide your passwords in a wallet, instead of using them dir...
Tuesday, April 14, 2020

How to avoid ERROR: role cannot be dropped because some objects depend on it in PostgreSQL

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When you try to drop a user in a PostgreSQL database, you may encounter this error: postgres=# drop role scott; ERROR: role "scott...
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Friday, April 3, 2020

How to work around hung rman process when duplicating from active database

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Applicable for Oracle 12.1. During a "clone from active database" operation, I had a seemingly stuck restore process. It used a...
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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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