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Linux/UNIX

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 may take a look on the I/O performances.
This blog aims to provide to introduction to a pretty interesting tool,

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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 posting focuses on the shell internals and “nightmare” more than on Oracle related issues.

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 analysis and looking for files and processes relations may be quite painful.

To get started with performance checks and analysis,

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Oracle SQL Developer & SQL Data Modeler on Ubuntu

Oracle SQL Developer and Data Modeler are becoming more and more popular as they are both cost-free and available on many Operating Systems (Linux/Unix,Windows and Mac) with different installation types: “This zip does not include JRE” or “This zip file includes the JRE”. On linux, the choice is limited because the only version available doesn’t include Java Runtime Environment. And

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Diving into Databases

By dbi services, we are a few poeples passionate by diving.
We take this opportunity to let you dive into the two databases lakes Oracle and SQL server and see their similarities and differences. For this first level of diving (named ODD), we will not going too deep and not have narcosis or

databases toxicity.
As always, we’ll start with

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Inside Grid Control

Lors de mon activité de consultant, et suite à un bug qui n’affiche pas correctement le nombre de CPU (OMS 10.2.0.5, agent 10.2.0.5 et linux x86_64), je me suis intéressé à la manière dont Oracle Enterprise Manager Grid Control (OEM GC) récupérait les informations de mémoire et de cpu sur les différents hôtes surveillés par ce dernier.