All articles

Oracle 12c CDB – metadata & object links internals

By Franck Pachot . Warning: this is only geek stuff about internals on multitenant database dictionary, metadata, and object links. It has nothing to do with the operations that you can do on your database. Don’t try that in(…)

AWR Formatter: plug-in Google Chrome pour rapports AWR

Chacun d’entre nous à une façon bien différente d’appréhender le rapport AWR (Oracle Automatic Workload Repository). Nous utilisons nos propres processus de lecture et notre propre appoche. Dans ce blog je vous propose de découvrir AWR Formatter, un outil qui(…)

SQL Server 2014: In-Memory tables, Bw-Tree, and storage

SQL Server 2014 introduces hash indexes with in-memory optimized tables. I described some of their aspects in a previous blog post.  These indexes are very efficient with lookup search operations but have some limitations with operations(…)

Oracle TNS_ADMIN issues due to bad environment settings

Recently, I faced a TNS resolution problem at a customer. The reason was a bad environment setting: The customer called the service desk because of a DBLINK pointing to a bad database. The users were supposed to be redirected to a(…)

Oracle 12c Adaptive Plan & inflection point

By Franck Pachot . The Oracle 12c Adaptive Plan feature was already presented by Nicolas Jardot in OOW 2013: Solving customer issues with the 12c Optimizer. I recently had to answer several questions about its behavior at execution(…)

How to install and manage a Kerberos Server

For some time now, I have been working on how to set up a Single Sign-On (SSO) solution in my company. As a big fan of Open Source solutions, I have obviously proposed the implementation of a solution based(…)

Best practice for the sending of an Oracle execution plan

By Franck Pachot . You have a query that takes too long and you want help to analyze the execution plan? Then you need to get it with relevant information, and correctly formatted. Autotrace is not a good option(…)

Kerberos SSO with Documentum D2 3.1 SP1

Last week, when I was working on how to setup the Kerberos SSO for D2 3.1 SP1, I faced some issues due to a documentation that doesn’t seem to be up to date… In fact, our version is D2 3.1(…)

Transparent data encryption, key management and backup strategies

Transparent Data Encryption requires the creation of a database key encryption. The database key is a part of the hierarchy of SQL Server encryption tree with at the top of the tree the DPAPI. Then if we traverse the(…)

The consequences of NOLOGGING in Oracle

By Franck Pachot . While answering to a question on Oracle forum about NOLOGGING consequences, I provided a test case that deserves a bit more explanation. Nologging operations are good to generate minimal redo on bulk operations (direct-path(…)