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How to remap tablespaces using Oracle Import/Export Tool

Since Oracle 10g, Oracle provides a great tool to import and export data from databases: Data Pump. This tool offers several helpful options, particularly one that allows to import data in a different tablespace than the source database. This parameter(…)

Oracle 12.1.0.2.1 Set to Join Conversion

By Franck Pachot . Recently, I described the Partial Join Evaluation transformation that appeared last year in Oracle 12c. I did it as an introduction for another transformation that appeared long time ago in 10.1.0.3 but was not(…)

How to find the SQL Server Management Pack in the SCOM database

While working on a customer project, I needed to retrieve the SQL Server SCOM Management Pack version. Unfortunately, the SCOM team took a while to answer and as I am the DBA, I have access to the SCOM databases.

Deploying a SQL Server database to Azure

Deploying an SQL Server database to a Windows Azure virtual machine is a feature introduced with SQL Server 2014. It can be useful for an organization  that wants to reduce its infrastucture management, simplify the deployment, or have a(…)

Documentum: some useful queries (DQL/IAPI)

In this blog post I want to sharing some useful DQL and IAPI queries that I am using all the time. They are more dedicated to Documentum support/debug and grouped by components. In order to use them, I recommend Qdman:(…)

SQL Server 2014: DBCC CHECKDB and ReFS support

Have you noticed an interesting behavior with SQL Server 2014 when you are running a dbcc checkdb command? If not, you should have a look at this blog post. I discovered it completely by accident during some tests. If(…)

Oracle 12.1.0.2: Wait event histograms in μs

By Franck Pachot . When an Oracle Database spends a high percentage of its DB time in User I/O, I usually check the wait event histograms in order to see if the storage system is working well. But today,(…)

SQL Server: DBCC CHECKDB does not detect corruption

During my audits at customer places, it still happens very often to find SQL Server databases with page verification option configured to “none”. I always alert my customers on this configuration point because it can have an impact on the(…)

PostgreSQL for Oracle DBAs – an introduction

Having worked for several years as an Oracle DBA, I decided to have a look at the PostgreSQL database and see how it functions in comparison to the Oracle Database. The “Enterprise DB” graphical installation of PostgreSQL 9.3 is(…)

PDB media failure may cause the whole CDB to crash

By Franck Pachot . Do you remember last year, when 12c arrived with multitenant, David Hueber warned us about the fact that a single PDB can, under certain conditions, generate a complete system downtime? We are beta testers(…)