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12.2 Archives - Blog dbi services

Jérôme Dubar

Focus on 19c NOW!

By | Database Administration & Monitoring, Database management, Oracle | No Comments

Introduction For years, Oracle used the same mechanism for database versioning. A major version, represented by the first number. And then a release number, 1 for the very first edition, and a mature and reliable release 2 for production databases. Both of them having patchsets (the last number) and regular patchset updates (the date optionally displayed at the end) to remove bugs and to increase security. Jumping from release 1 to release 2 required a…

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Oracle Team

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

By | Database Administration & Monitoring, Database management, Development & Performance, Hardware & Storage, Oracle | No Comments

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 parameter undo; NAME TYPE VALUE ———————————— ———– —————————— temp_undo_enabled boolean FALSE undo_management string AUTO undo_retention integer 3600 –extended from 900, undo_tablespace string UNDOTBS1 But, are some scenarios where the above rule is not working . We…

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Oracle Team

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

By | Database Administration & Monitoring, Database management, Oracle | One Comment

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 nomount mode. rman target / restore primary controlfile from ‘backup_location_directory/control_.bkp’; exit; By specifying “restore primary” , will modify the flag into the controlfile, and will mount a primary role instance instead of a standby one….

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Oracle Team

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

By | Database Administration & Monitoring, Database management, Development & Performance, Oracle | No Comments

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 repair the Standby database, without to be necessary to restore entire database. Initial situation : DGMGRL> connect / Connected to “PROD_SITE2” Connected as SYSDG. DGMGRL> show configuration; Configuration – CONFIG1 Protection Mode: MaxPerformance Members: PROD_SITE2 -…

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Jérôme Dubar

Reimaging an old X3-2/X4-2 ODA

By | Database Administration & Monitoring, Oracle | One Comment

Introduction X3-2 and X4-2 ODAs are still very capable pieces of hardware in 2018. With 256GB of RAM and at least 16 cores per node, and with 18TB RAW disk capacity as a standard these appliances are far from obsolete even you probably don’t have any more support on the hardware from Oracle. If you own several ODAs of this kind, hardware support may not really be a problem. If something fails, you can use…

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Oracle Team

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

By | Application integration & Middleware, Database Administration & Monitoring, Database management, Oracle | No Comments

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 as well as online allocation of compute resources where needed, when needed. Oracle Grid Infrastructure provides the necessary components to manage high availability (HA) for any business critical application. HA in consolidated environments is no…

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Oracle Team

Upgrade Oracle Grid Infrastructure from 12.1.0.2.0 to 12.2.0.1.0

By | Database Administration & Monitoring, Database management, Oracle | No Comments

The following blog will provide the necessary steps to upgrade the Grid Infrastructure from 12.1 to 12.2, for a Standalone Server. One of the new features of GI 12.2 is the usage of the AFD (Oracle ASMFD Filter Driver). Assumptions : You have installed Oracle GI 12.1 as grid user You have installed Oracle Database 12.1 as oracle user You have configured the groups asmadmin,asmoper,asmdba You installed oracle-rdbms-server-12cr2-preinstall rpm You patched your Oracle GI to…

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David Hueber

ODA 12.2.1.2.0: Some curious password management rules

By | Database Administration & Monitoring, Hardware & Storage | One Comment

While deploying an ODA based on the DCS stack (odacli), it is mandatory to provide a “master” password at appliance creation. The web GUI provides for that a small tooltip which describes the rules applied on password management. However it looks like there is some flexibility with those rules. Lets try to check this out with some basics tests.

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Jérôme Dubar

One command database upgrade on ODA

By | Database Administration & Monitoring | No Comments

The 12.2 finally arrived on ODA and is now available on all generations. Modern ODAs are now supporting 11.2.0.4, 12.1.0.2 and 12.2.0.1 database engines, and these 3 versions can work together without any problem. You probably plan to upgrade some old databases to the latest engine, at least those still running on 11.2. As you may know, 11.2  is no more supported with premier support since January 2015: it’s time to think about an upgrade….

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David Hueber

ODA 12.2.1.2.0 – VLAN Management

By | Database Administration & Monitoring | 2 Comments

Virtual Local Area Network (VLAN) have become since several years a standard in enterprise class networks. Most enterprises are now segregating their network, especially for security reasons, between server and user or prod and test or applications and backup and aso. In the new release of ODA we finally get the support for VLAN on the bare metal platform. This article will briefly demonstrate how these are managed using ODAADMCLI.

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