Oracle 11g

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).

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(…)

How to migrate Grid Infrastructure from release 12c to release 18c

Oracle Clusterware 18c builds on this innovative technology by further enhancing support for larger multi-cluster environments and improving the overall ease of use. Oracle Clusterware is leveraged in the cloud in order to provide enterprise-class resiliency where required and dynamic(…)

Control File issues on duplicating with non patched Oracle version.

Introduction : RMAN has the ability to duplicate, or clone, a database from a backup or from an active database. It is possible to create a duplicate database on a remote server with the same file structure, or(…)

Oracle 18c clone PDB and Transparent Data Encryption

Let’s do some tests with the Oracle 18c new feature in creating PDB clone with DBCA. Unfortunately, this feature does not work when you have TDE enabled. Just to remember, with Oracle 12.2 we had the possibility to create PDBs with(…)

ODA migration challenges: Non-OMF to OMF + 11.2.0.3 to 11.2.0.4

To do some application and performances tests, I had to copy a database from a third party Linux server to an ODA X7-2M. Looks pretty simple on the paper, but 2 small challenges came into the game. The first was(…)

ORACLE 11g to 12c RMAN catalog migration

This is a small migration demo of a 11g catalog (RCAT11G) to a new 12c catalog (RCAT12c). Demo databases environments have been easily managed thanks to DBI DMK tool. oracle@vmreforadg01:/home/oracle/ [RCAT11G] sqh SQL*Plus:(…)

Grid Infrastructure 11.2.0.3 PSU: My Opatch version check is failing

Mouhamadou Diaw Last day I was configuring grid infrastructure 11.2.0.3 for a standlone server. After the installation, I decided to apply the Patch Set Update 11.2.0.3.7 (Includes Database PSU 11.2.0.3.7) – 16742216 In the documentation it is marked(…)

Enable 10046 Tracing for a specific SQL

Available methods to enable 10046 trace are described in My Oracle Support Note 376442.1. You can enable 10046-tracing – on session level (alter session) – for other sessions (e.g. with oradebug, the package DBMS_MONITOR or DBMS_SYSTEM) What is not(…)

Oracle DBA Essentials Workshop – Patchset 11.2.0.4 Available

We have Upgrade our Environment Oracle DBA Essentials Workshop of release 11.2.0.3 to 11.2.0.4. From now on, you can operates the various subjects on the new release. In this article, I present you the procedure to be followed for(…)