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SQL Server 2014 : sortie du livre "Développer et administrer pour la...
Un billet en cette fin d'année qui approche à grand pas pour vous annoncer la sortie prochaine (fin décembre 2014) du livre SQL Server 2014 : Développer et administrer pour la performance en français...
View ArticleOracle 12c: Can we disable logging for DML?
If we don't mind about loosing our changes, then can we disable logging for DML? This is a question I've heard a lot. Ok, you don't need to recover your changes but Oracle may want to recover the...
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Journées SQL Server 2014: Vidéos des sessions disponibles
Les vidéos des sessions des journées SQL Server 2014 sont enfin en ligne: > Infrastructure et AlwaysOn > Industrialisation des audits (avec Sarah Bessard) Si vous avez des questions...
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How to store SQL Server data files in Azure Storage
A new functionality, introduced with SQL Server 2014, enables to store data files from a SQL Server database in Windows Azure Storage. In this posting, I will show how it works. Accessing Azure...
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dbi services wishes you a Merry Christmas with this SQL Server script
The end of the year approachs and soon it will be time to celebrate Christmas with your family and friends. At dbi services, we wish you a merry christmas via SQL Server with the following script, to...
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MySQL versions performance comparison
Introduction This blog aims to make a performance comparison between the different MySQL versions/editions and also comparing the differents MySQL forks such as Percona Server and MariaDB. Indeed...
View ArticleCreate schema synonym in Oracle (unsupported feature)
Ivica Arsov (@IvicaArsov) has made an interesting comment about AUDIT_ACTIONS object link table. I'll blog about it soon, but in the meantime when checking its definition in cataudit.sql it came upon...
View ArticleHappy New Year 27, 104, 2015 and 2558
calendar today tomorrow message ----------------- ------ --------- -------------- Arabic Hijrah 1436 1436 English Hijrah 1436 1436 Gregorian 2014 2015 Happy New Year Japanese Imperial 0026 0027 Happy...
View ArticleOracle multitenant dictionary: object links
I've described Oracle 12c metadata and object links internals in a previous post. But before that, the first time I investigated on it, I made a wrong assumption because I was looking at AUDIT_ACTIONS...
View ArticleOracle multitenant dictionary: metadata links
As in previous posts (1 and 2) I'm still playing with multitenant dictionary. You may wonder why I'm spending time to do unsupported things that we will never be able to use in real life. Of course,...
View ArticleOracle multitenant dictionary: upgrade
This is a second part of the previous post about metadata link. I've shown how a sharing=metadata function becomes a sharing=none function when it is changed in the pdb - i.e when not having the same...
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Managed Backup with SQL Server 2014
In a previous blog post called Backup a SQL Server database from On-Premise to Azure, I presented the different tools to backup your on-premise databases on Azure Storage. SQL Server Managed Backup to...
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Don't forget to configure Power Management settings on Hyper-V
Recently I had the opportunity to audit a SQL Server database hosted on a Hyper-V 2012 cluster. I noticed that the guest operating system had the Power Plan configured to High performance. This is...
View ArticleInsert into GTT: bulk with APPEND_VALUES
This post is about the case I had where a GTT was generating too much undo. The effects were amplified by the fact that the database was in flashback logging (see Jonathan Lewis answer in my question...
View ArticleFlashback logging overhead: 'db file sequential read' on UNDO tablespace
in my previous post I've reproduced an issue where some bulk insert into a GTT was generating too much undo. But the real case I encountered was worse: the insert was reading lot of UNDO. And lot of...
View ArticleSOUG-Romand: Journée performance le 21 mai
(english below) Bonne nouvelle pour les francophones: le SOUG-R est de plus en plus actif. Le 21 mai 2015 une journée performance est organisée sur Lausanne.
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SQL Server 2014: FCIs, availability groups, and TCP port conflict issues
After giving my session about SQL Server AlwaysOn and availability groups at the last French event “Les journées SQL Server 2014”, I had several questions concerning the port conflict issues,...
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Birst: an attractive "all-in-one" Business Intelligence solution
The review of the Gartner Magic Quadrant for Business Intelligence and Analytics Platforms has revealed a new challenger that could become one of the leader of this market: Birst - an interesting...
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SQL Server: Online index rebuild & minimally logged operations
A couple of days ago, I encountered an interesting case with a customer concerning a rebuild index operation on a datawarehouse environment. Let me introduce the situation: a “usual DBA day” with an...
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IOUG Collaborate #C15LV
The IOUG - Independant Oracle User Group - has a great event each year: the COLLABORATE. This year it's in April 12-16, 2015 at The Mandalay Bay Resort & Casino in Las Vegas. I'll be a speaker and...
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