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Franck Pachot

Database is more than persistence. It is shared. My thoughts about Microservice Database.

By | Oracle | 4 Comments

The development teams often see the database as a ‘persistence layer’ only. And sometimes it is mentioned that the database is always the cause of the problems, especially when implementing continuous integration and trying to be agile. Then cames the idea to have this ‘persistence layer’ in an isolated environment, such as a docker container, with the database for each developer. However, this overlooks the real cause of the problems, which is not the persistence…

 
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Franck Pachot

Archivelog deletion policy on Data Guard configuration

By | Oracle | No Comments

The deletion policy on a dataguard configuration should be: CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY; for the site where you don’t backup. It can be the standby or the primary. and: CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY BACKED UP 1 TIMES TO DISK; for the site where you do the backups. It can be the primary or the standby. I’ve always configured it in this way, but I recently…

 
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Franck Pachot

VirtualBox 5.2 exports the VM to the Oracle Cloud

By | Database Administration & Monitoring | No Comments

The new release of Oracle VM VirtualBox (aka VirtualBox) is there with a new functionality to export a VM to the Oracle Cloud Compute (aka Oracle Cloud Infrastructure). That can be interesting to prepare a VM on my laptop and move it to the Cloud to get it accessible from everywhere. Here’s my first try. In my opinion, it’s idea but probably need further evolution.  

 
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Mehdi Bada

Managing Oracle Big Data Cloud – CE with REST API

By | Big Data, Cloud, Oracle | 3 Comments

In this blog post, we will see how to manage Oracle Public Cloud Big Data service Compute Edition with REST API. Scheduling the start/stop/restart of a metered PaaS in the Oracle Cloud can be interesting for managing efficiently the consumption of your cloud credits. We should first have a look at the official documentation so as to understand what the API is composed of. https://docs.oracle.com/en/cloud/paas/big-data-compute-cloud/csbdp/QuickStart.html  Use the following URL composition to get access to REST endpoint: https://region-prefix.oraclecloud.com/resource-path According…

 
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Franck Pachot

When deterministic function is not

By | Oracle | No Comments

When you declare a function-based index, the function is deterministic, which means that calling it with same arguments will always return the same result. This is required because the indexed values, which are the result of the function, are stored in the index. But what happens if you declare a function deterministic when it is not?  

 
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Daniel Westermann

Be careful when putting the Oracle ADR on xfs, or better 4K sector format drives

By | Database Administration & Monitoring | No Comments

Today, after we did a fresh setup of a Grid Infrastructure cluster (12.1.0.2.170814) we faced two issues reported in the alert.log of the ASM instances (in fact you would see the same for the alert logs of any instance in that configuration but we did not had any other instance up and running at that time): This: ORA-00700: soft internal error, arguments: [dbgrfrbf_1], [/disk00/app/grid/diag/asm/+asm/+ASM2/metadata/INC_METER_SUMMARY.ams], [0], [4], [], [], [], [], [], [], [], [] ORA-27072:…

 
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Franck Pachot

impdp content=metadata_only locks the stats

By | Oracle | No Comments

With Oracle you can learn something every day. Today, preparing a migration to 12.2, I found all tables had locked statistics. I learned that it is the expected behavior since 10.2 when importing metadata_only including statistics, to avoid that the automatic job gathering comes and replaces the stats by ‘0 rows’.  

 
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