Database management

SQL Server AlwaysOn : the registry is also important for availability groups

A couple of months ago, we experienced with my colleague Nathan Courtine a weird issue at one of our customers. This issue concerned an AlwaysOn availability group and more precisely to the WSFC cluster layout. I(…)

Introduction to MongoDB

MongoDB is an open source NoSQL database management system document-oriented. MongoDB allows the manipulation of structured and unstructured data. It is schema-less and can be used to store a large data volume. This blog is explaining the main principle of(…)

SQL Server Tips: Default trace enabled but no file is active…

I discover a strange error with a customer about the default trace. As you know, SQL Server has a default trace with a lot of events like the data and log file growth. This trace is enabled by default and(…)

SQL Server 2016 – availability groups and gMSAs

This blog post will probably not concern customers where either password policy change rules are not defined for service accounts or Kerberos authentication is not used. But I’m sure that the number of these customers has decreased over at least(…)

pg_dump: [archiver (db)] query failed: ERROR: schema “sys” does not exist

As I could not find any information about this error when I faced it this is just a short hint: If you try to use pg_dump or pg_dumpall out of a(…)

Monitoring tools for PostgreSQL – POWA

The last posts introduced the logging system, pg_stat_statements, pg_activity and pgcluu. This post will look at POWA: PostgreSQL Workload Analyzer. For getting the most out of POWA the following extension(…)

SQL Server 2016 CTP3.0: Stretch Database enhancements

Some months ago, my colleague Nathan explained you the bases of the new Stretch Database functionality via two blogs here and here. With the new SQL Server 2016 CTP 3.0, Stretch Database now includes new features and(…)

Querying the Oracle Management Repository

The Enterprise Manager Cloud Control 12c is an amazing tool allowing the DBA to display a lot of informations from the console . But there are also a lot of repository views that may be consulted by the DBA to(…)

DBA, turkeys and NoSQL hype

By Franck Pachot . We (DBAs) look at this NoSQL hype with a large smile. We know how powerful are SQL databases and we can't imagine processing data seriously without it. And the technologies that come with NoSQL brings back(…)

How to be sure that tempdb size is good to run a DBCC CHECKDB?

In many blogs or forums, you can read that the answer is to use the option: WITH ESTIMATEONLY. With this option, you can easily have the space estimation needed to check the database in tempdb. But be careful, only since(…)