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, August 27, 2015

How to solve: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

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After a fresh install of an Oracle 32-bit client on a 64-bit Linux server, we received the following errors when we tried to use any of the ...

How to create a symlink in unix

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Syntax: ln -s /path/physical_file symlink For example cd $ORACLE_HOME/lib ln -s /u01/oracle/product/oracle_client32/lib/libclntsh.so.11...
Monday, August 24, 2015

What does the DEFAULT DEGREE on tables actually mean?

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The DOP (degree of parallelism) settings on a table has to do with the number of threads per instance for scanning the table (an integer), o...
Tuesday, August 11, 2015

How to use cpio on AIX

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I recently received a patch from Oracle support, and when unpacking with unzip, the resulting file was in the cpio format. Unpacking this fi...
Tuesday, July 28, 2015

How to create and how to extract a .tar file

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Create a tar file of all the files in the current directory: tar cvf myfile.tar * or put it in a different directory: tar cvf $HOME/myf...
Tuesday, July 21, 2015

How to solve ORA-17628: Oracle error 19505 returned by remote Oracle server during clone from active database

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After some time, my RMAN "duplicate from active database" script threw the error below: RMAN-03009: failure of backup command on...

How to solve ORA-17627: ORA-12154: TNS:could not resolve the connect identifier specified during clone from active database

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During an attempt to clone from active database, the following error was thrown: RMAN-00571: =============================================...
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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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