Operating systems

Unable to resize tmpfs on Oracle Enterprise Linux 6 versions

I recently helped to create a lab dedicated to a training about Oracle backup and recovery, with Oracle 11g databases. While creating several databases on an Oracle Enterprise Linux 6.1, I wanted to resize the tmpfs to allocate more memory(…)

Linux: Disks diagnostic using smartctl

Facing disk issues such as corruption or block defect is thankfully not happening frequently. However when it does, the diagnose may look sometimes like a real struggle. This is forgetting that disks integrate since years the S.M.A.R.T technology. Good point,(…)

How to add new tables in existing Oracle GoldenGate replication

Introduction Often some times after having setting up a replication environment, it is needed to add additional tables to the replication, where the additional tables have dependency with the current replicated tables. This tasks must be implemented without disturbing(…)

Red Hat 6.1: unable to read group information from repositories

During one of my recent missions I had the opportunity to install Red Hat 6.1 on a ESX Virtual Machine. During the installation process I got a strange message: "unable to read group information from repositories". If you also encounter(…)

Using IOzone for Linux disk performance analysis

Who never had to measure the disk performances on a system? Speaking about Linux performance monitoring includes a significant part on disk performances. If you are facing applications or databases running slower than expected or than on other environments, you(…)

Windows 8 customer preview now available!

Following my article about Windows 8, today, Microsoft released the customer preview. It's just a small article to announce this fresh news!(…)

Why Perl is my choice for scripting

I have been advising to use Perl for a long time in order to automate Oracle processes and operations. This week however, I tried for once to write a small procedure on a simple Linux shell (ksh and bash). This(…)

Linux: easing the process and performance monitoring with htop

I'm pretty sure that most of you already struggled with some low performance systems. In order to analyse such cases several tools and utilities, like top, nmon, fuse or lsof are available under Linux. However trying to dig in processes(…)

A preview of Windows 8 – codename Chidori

With the first video from Windows 8 the 02/06/2011 on YouTube, dbi services must talk about it to present you some information about Windows 8.

Oracle Cluster 11g R2 listener down – que faire ?

Dans un environnement cluster le listener ne peut pas démarrer avec une erreur sur la définition de nom "locahost" défini dans le fichier /etc/hosts.