Development & Performance

SQL Server 2016: Microsoft R Server

In my last article, I wrote about the R Services into SQL Server. Now, Microsoft provides an open source R platform to complete this new SQL Server integrated feature in 2016.

APEX Connect 2016 – Day 2 – APEX

After the great Keynote about “APEX Vision, Past, Present, Future” by Mike Hichwa, the father of APEX, I decided to attend presentations on following topics: – Dynamic Actions 5.1 – APEX and Oracle JET – Enterprise UX(…)

SQL Server 2016: R Services

I was during a long time captivated by the R programming language. I’m happy to see that SQL Server 2016 provides now a SQL Server R Services. This service enables SQL Server to execute R scripts. The first(…)

Java: Cannot delete file?

You may once went into the struggle to delete a file in java? So do I… I went so mad when I figured out that my files were still present even after a file.delete() or file.deleteOnExit(). It always(…)

SQL Server 2016 : nonclustered columnstore index and aggregate pushdown

Did you miss aggregate pushdown capability shipped with columnstore index? Well, I remember the first time I heard about it is was when I read the very interesting blog post of Niko Neugebauer here with a(…)

Sudden drop of the page life expectandy but don’t panic yet!

A couple of weeks ago, I had an interesting discussion with one of my customer about the page life expectancy (aka PLE). He asked me if monitoring the metric value is a best practice because he often noticed a big(…)

Changing an existing partition configuration … Well, not so easy!

This time let’s talk about an interesting customer scenario where table partitioning was implemented on a table with 100 GB of data on SQL Server 2014. Partitioning in this context aimed to save disk space  (archive data were compressed) , help(…)

NOLOCK is definitely not what you may expect …

For those who still believe that using nolock hint is a lock-free process, keep reading this blog post. I wrote a previous blog post 3 years ago, when I was at one of my customer and(…)

Dynamic filters and “kitchen sink” queries dilemma

Dealing with dynamic filters is a common scenario with management software or ERP. Indeed, users should like to have the flexibility to filter and sort their business data as they want in order to be efficient. Target and operate quickly(…)

Enable 10046 Tracing for a specific SQL

Available methods to enable 10046 trace are described in My Oracle Support Note 376442.1. You can enable 10046-tracing – on session level (alter session) – for other sessions (e.g. with oradebug, the package DBMS_MONITOR or DBMS_SYSTEM) What is not(…)