Oracle Team

Oracle is hanging? Don’t forget hanganalyze and systemstate!

By Franck Pachot . sqlplus / as sysdba oradebug setmypid oradebug unlimit oradebug hanganalyze 3 oradebug dump ashdumpseconds 30 oradebug dump systemstate 266 oradebug tracefile_name Your Oracle database – production DB, of course – is hanging. All users are blocked.

Archivelog deletion policy for Standby Database in Oracle Data Guard

By Franck Pachot . Do you use ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY for your Oracle databases in Data Guard? Maybe you also use the Fast Recovery Area as archive log destination. That’s good practice! But did(…)

Oracle LOBs: Infer the file type with dbms_lob package

LOBs (Large OBjects) first appeared in Oracle 7 and were created to store large amount of data such as document files, video, pictures, etc. Today, we can store up to 128 TB of data in a LOB, depending on the(…)

Oracle 12c: Applying PSU 12.1.0.1.1 with Multitenant DB & unplug/plug

The concept of Multitenant databases, which was introduced with Oracle 12c in June 2013, allows to run several databases on a single instance. Oracle presents this feature as a good solution for Oracle patching. The reason behind it is(…)

Sockets, Cores, Virtual CPU, Logical CPU, Hyper-Threading: What is a CPU nowadays?

By Franck Pachot . Because people know that I really like Oracle AWR reports, they send them to me from time to time. Here is one I have received for Christmas with the following question: ‘Since our AIX server(…)

Implementing Oracle Database as a Service (DBAAS)

Oracle DBAAS (Database As a Service) offers a good solution for on demand access to software and infrastructure. In this posting, I will describe the DBAAS implementation with Enterprise Manager Cloud 12c. Why Database as a Service is interesting When(…)

Oracle Database 12c: Database Migration Assistant for Unicode

The choice of the correct character set before you create an Oracle 12c database is an important decision. You have to know the type of data you have to store and the languages needed by the Oracle database. Oracle(…)

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 Database 12c: ACFS – un système de fichier pour vos bases

La version 12c d’Oracle Grid Infrastructure introduit de nombreuses nouveautés dans le support d’ACFS, le système de fichiers clusterisés d’Oracle. Nous abordons dans ce posting la capacité d’ACFS d’être le système de fichier de votre base de données ainsi que sa(…)

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(…)