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12c Multitenant internals: PDB replay DDL for common users

By Franck Pachot . In multitenant, you can create common Users, Roles, and Profiles. You create them in CDB$ROOT, with the CONTAINER=ALL clause (which is optional because it is the only possible value when connected to CDB$ROOT) but they are(…)

Drop PDB including datafiles may keep files open

By Franck Pachot . I like that Oracle drops the datafiles from the operating system when we remove them from the database (with drop tablespace or drop pluggable database) because I don't like to have orphean files remaining in the(…)

12cR2 Subquery Elimination

By Franck Pachot . More and more we can see crazy queries generated by ORM frameworks or BI query generators. They are build to be easily generated rather than being optimal. Then, the optimizer has to implement more and more(…)

Oracle Licensing (R)evolution with VMware

In 2015 I wrote a blog named “All you need to know about Oracle Database licensing with VMware”. This blog generated lots of comments and hopefully helped some DBAs and IT Managers understanding the potential issues that they(…)

Online datafile move in a 12c dataguard environment

By Mouhamadou Diaw Oracle 12c introduces moving online datafile. One question we might ask is what about moving datafile online in a dataguard environment. In this blog we will do some tests Below our configuration, we are using oracle(…)

Oracle 12.2 Dataguard : PDB Flashback on the Primary

By Mouhamadou Diaw The last day I was discussing with one colleague about database flashback for a pluggable database in a dataguard environment. I did some tests and I present results in this blog. Below our broker configuration. Oracle(…)

Automate OVM deployment for a production ready Oracle RAC 12.2 architecture – (part 02)

In this post we are going to deploy a R.A.C system ready to run production load with near-zero knowledge with R.A.C, Oracle cluster nor Oracle database. We are going to use the “Deploy Cluster Tool” which is provide by Oracle(…)

Oracle docker image from docker store

By Franck Pachot . Did you notice that each time you want to download the Oracle binaries from the OTN website (for non-production usage) you have to click on the "Accept License Agreement"? This is because you have to agree(…)

Does pg_upgrade in check mode raises a failure when the old cluster is running?

Today I had the pleasure to have Bruce Momjian in my session about PostgreSQL Upgrade Best Practices at the IT Tage 2017 in Frankfurt. While browsing through the various options you(…)

SQL Server Tips: an orphan user owns a database role

A few days ago, I conduct an audit to detect all orphan’s windows accounts in a database and I was surprise to have an error during the drop user query.   The first step is to find all orphan’s windows(…)