Oracle

Migrating Oracle database from windows to ODA

Nowadays I have been working on an interesting customer project where I had to migrate windows oracle standard databases to ODA. The ODAs are X7-2M Models, running version 18.5. This version is coming with Red Hat Enterprise Linx 6.10 (Santiago).

Moving oracle database to new home on ODA

Moving database to new ORACLE_HOME is a common dba task. Performing this task on an ODA will need an additional step knowing ODA Lite is using an internal Derby database for the metadata. ODA HA will not be a problem(…)

Useful Linux commands for an Oracle DBA

Introduction Oracle & Linux is a great duet. Very powerfull, very scriptable. Here are several commands that make my life easier. These tools seems to be widespread on most of the Linux distributions. watch with diff It’s my favorite tool(…)

Huawei Dorado 6000 V3 benchmark

I had the opportunity to test the new Dorada 6000 V3 All-Flash storage system. See what the all-new Dorado 6000 V3 All-Flash Storage system is capable as storage for your database system.

Discover target database 18c with EM12c

Working on Enterprise Manager 12.1.0.4 version at a client’s site, we would like to know if oracle database target in 18c version could be discovered and monitored, even if Enterprise Manager 12.1.0.4 does not support Oracle 18c database targets. Installing(…)

When you change the UNDO_RETENTION parameter, the LOB segment’s retention value is not modified

Below, I will try to explain, a particular case for the general error : ORA-01555 snapshot too old error.. Normally, when we have this error, we are trying to adapt the retention parameters or to tune our queries. SQL> show(…)

Create a primary database using the backup of a standby database on 12cR2

The scope of this blog will be to show how to create a primary role database based on a backup of a standby database on 12cR2. Step1: We are assuming that an auxiliary instance has been created and started in(…)

Italian Oracle User Group Tech Days 2019

The Italian Oracle User Group (ITOUG) is an independent group of Oracle enthusiasts and experts which work together as volunteers to promote technical knowledge sharing in Italy.

Recover a corrupted datafile in your DataGuard environment 11G/12C.

On a DG environment, a datafile needs to be recovered on the STANDBY site, in two situations : when is deleted or corrupted. Below, I will explain  how to recover a corrupted datafile, in order to be able to(…)

Restart a failed transportable tablespace import during a cross platform incremental backup migration

I’m currently working in a project to migrate a 11g-Datawarehouse-database from Solaris to Linux Intel (Endian-change). We do use the cross platform incremental backups method as described in My Oracle Support Note 1389592.1 for that. I.e. incremental backups are(…)