Database management

SQL monitoring 12.1.0.2 shows adaptive plans

By Franck Pachot . In a previous post, I have described Adaptive Plans. Even if I prefer to show plans with the SQL Monitor active html format, I had to stick with the dbms_xplan for that because SQL(…)

Beyond In-Memory, what’s new in 12.1.0.2 ?

By Franck Pachot . It’s just a patchset. The delivery that is there to stabilize a release with all the bug fixes. But it comes with a lot of new features as well. And not only the one that(…)

Drilling down V$RECOVERY_AREA_USAGE

By Franck Pachot . In a previous post I used X$KCCAGF to get more information about reclaimable archived logs in FRA, because there is a bug in standby (not opened) databases where archivelog deletion policy is ignored. I(…)

Oracle EM agent 12c thread leak on RAC

By Franck Pachot . In a previous post about nproc limit, I wrote that I had to investigate the nproc limit with the number of threads because my Oracle 12c EM agent was having thousands of threads. This(…)

Master Data Services installation for SQL Server 2012

This posting is a tutorial for installing Master Data Services on your Windows Server 2012. Microsoft SQL Server Master Data Services (MDS) is a Master Management product from Microsoft, code-named Bulldog. It is the rebranding of the Stratature MDM(…)

Partial Join Evaluation in Oracle 12c

By Franck Pachot . Do you think that it’s better to write semi-join SQL statements with IN(), EXISTS(), or to do a JOIN? Usually, the optimizer will evaluate the cost and do the transformation for you. And in this(…)

SQL Server 2014: Are DENY ‘SELECT ALL USERS SECURABLES’ permissions sufficient for DBAs?

SQL Server 2014 improves the segregation of duties by implementing new server permissions. The most important is the SELECT ALL USERS SECURABLES permission that will help to restrict database administrators from viewing data in all databases. My article is(…)

Oracle Parallel Query: Did you use MapReduce for years without knowing it?

By Franck Pachot . I’ve read this morning that MapReduce is dead. The first time I heard about MapReduce was when a software architect proposed to stop writing SQL on Oracle Database and replace it with MapReduce processing.

SQL Server: How to find the default data path?

I have read a lot of SQL Server blog postings and articles in order to find the default data path. This post covers different SQL Server versions (SQL Server 2012, SQL Server 2014, SQL Server 2008, SQL Server 2005)(…)

How to list all Oracle system schemas

By Franck Pachot . Do you want to know which users come with the Oracle Database and which are the ones you have created? This is that not easy, especially prior to Oracle 12c. You know SYS and SYSTEM,(…)