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Database management

Petre Radut

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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Stéphane Haby

SQL Server Temporal Table – How to store a history table in another file?

By | Database Administration & Monitoring, Database management, SQL Server | No Comments

Few days ago, a customer asks me if it is possible to move the history table to slower but cheaper storage. The question behind this is whether it is possible to create a history table on a separate filegroup and file. Few years ago, I write a serie of blogs about temporal table here. I will take the same example to try to set up a filegroup specific to a history table. In my sample,…

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Jérôme Dubar

How to patch your ODA lite to 18.3.0.0.0

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

Even you don’t need 18c, or you’re not ready for this release, this patch will also update your 11gR2, 12cR1 and 12cR2 databases to the latest PSU available on ODA, it means for example the patchset from last July if you’re using 12cR1. Here is how to apply this latest patch for your ODA lite. In this example, the patch was applied on an X6-2S ODA running on previous release: 12.2.1.4.0. 1) Download the patch…

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Petre Radut

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

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

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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Petre Radut

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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Christophe Cosme

Copy or Migrate a SSISDB environment

By | Business Intelligence, Database Administration & Monitoring, Database management, SQL Server | No Comments

Integration catalog is easy to work with and the environments feature is as well very convenient. In SQL Server management Studio, there are a lot of features available to administrate your SQL Server instances, but some are missing that can be very useful. You have the possibility to move an SSISDB environment but this is only possible in another folder of your SSIS catalog. But how if you will to duplicate your environment or move…

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Joël Cattin

OEM Cloud Control 13c – Agent Gold Image

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

Introduction I am currently setting up a new “Base Image” virtual machine (Red Hat Enterprise Linux 7.6) which will be used to create 6 brand new Oracle database servers requested by a customer. Besides installing and configuring the OS, I also have to install 3 Oracle Homes and one Cloud Control Agent 13c. An OMS13c server already exists including an Agent patched with the EM-AGENT Bundle Patch 13.2.0.0.181031 (28680866) : [email protected]:/home/oracle/ [agent13c] opatch lsinventory |…

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Thomas Rein

DOAG 2018: OVM or KVM on ODA?

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

The DOAG 2018 is over, for me the most important topics were in the field of licensing. The insecurity among the users is great, let’s take virtualization on the ODA, for example: The starting point: The customer uses Oracle Enterprise Edition, has 2 CPU licenses, uses Dataguard as disaster protection on 2 ODA X7-2M systems and wants to virtualize, he also has 2 application servers that are also to be virtualized. Sure, if I use…

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Yann Neuhaus

Flashback to the DOAG conference 2018

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

Each year, since the company creation in 2010, dbi services attends the DOAG conference in Nürnberg. Since 2013 we even have a booth. The primary goal of participating to the DOAG Conference, is to get an overview about the main trends in the Oracle business. Furthermore, this conference and our booth allow us to welcome our Swiss and German customers and thank them for their trust. They’re always pleased to receive some nice Swiss Chocolate…

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