Operating systems

Linux: how to monitor the nofile limit

By Franck Pachot . In a previous post I explained how to measure the number of processes that are generated when a fork() or clone() call checks the nproc limit. There is another limit in /etc/limits.conf – or(…)

Oracle Database 12c New Features: Uninstaller encapsulated into installation media

Among the Oracle 12c new features there is the addition of an uninstall tool encapsulated in the Oracle database binaries. There is no more the necessity to download the deinstallation tool for Oracle products (deinstall utility). In this blog I(…)

Oracle Grid Infrastructure 12c: Binaries installation

In a previous article, I have shown how to configure two servers in order to deploy a two-nodes 12c cluster. This time, I am going to describe the Grid Infrastructure 12c installation process using Oracle Universal Installer (OUI). We(…)

Oracle Grid Infrastructure 12c: prerequisites for installation

Grid infrastructure 12c has recently been released. In this posting, I will show that the installation prerequisites are quite similar between Grid Infrastructure 11g and 12c. We will see parts of them during a review for the deployment of(…)

Oracle Database 12c: Grid Infrastructure, quoi de neuf?

A la lecture du New Features Guide, on trouve dans le chapitre sur Grid Infrastructure beaucoup de nouvelles fonctionnalités pour Grid Infrastructure, ASM et ACFS, mais l’événement est l’annonce d’une grosse évolution dans l’architecture du cluster. Flex Cluster En(…)

Oracle RAC 11.2.0.2: A disturbing loop in a “ohasd” startup script

Last February, I performed an operating system rolling upgrade on a four-nodes RAC cluster (11.2.0.2). I then faced a strange problem when restarting the operating system… The first step of the procedure was to stop all Grid Infrastructure and Database(…)

Boot sequence for all Linux-based operating systems

In this bog posting, I will present a boot sequence that works for all Linux-based operating systems – from switching on the power to the login screen.   7 steps There are 7 steps for Linux startup: Power(…)

Oracle Database Appliance: new ODA X3-2 architecture

A few weeks ago, I posted an article about Oracle Database Appliance, focusing on ODA version 2.5.0.0.0. However, a new update of ODA, version 2.5.5.0.0, was released by Oracle on 5 March. This posting will focus on the new(…)

Oracle Database Appliance (ODA) – an overview

Last february, I had the chance to attend an Oracle presentation about ODA: Oracle Database Appliance. I found it interessant to share what I have learned about this technology. Which, I confess, convinced me. Summary Before developing the software(…)

Overview of Oracle Linux releases and kernels

As everybody knows, Linux regroups several operating system families. The most popular Linux OS are Debian, Red Hat, or Suse. But each family has many derived Linux distributions. In November 2006, Oracle released the first version of its operating(…)