Database management

Oracle 12c – How to Recover lost DataGuard Broker Configuration Files

By William Sescu If you are using RMAN to back up your database, you are already doing the right thing. However, RMAN does not take care of everything. e.g. it is not backing up the following things, to mention just(…)

Oracle 12c – Recreating a Controlfile in a Data Guard environment with noresetlogs

By William Sescu Sometimes you might run into situations where the controlfile does not represent the backups and archivelogs correctly, because of a mismatch of the control_file_record_keep_time and the RMAN retention. The controlfile has non circular and a circular records.

Oracle 12c – How to correct the error: “RMAN-20005: target database name is ambiguous”

By William Sescu I do have a Data Guard environment, where I have configured the RMAN DB_UNIQUE_NAME persistent setting for my primary and the standby. With the RMAN DB_UNIQUE_NAME settings I am able to run reports my Oracle Data Guard(…)

Oracle 12c – Combining Flashback Drop and Flashback Query

By William Sescu If you think that Flashback Drop feature just brings back your table, then this is only half of the story. It does much more than that. Besides undropping the table, it also brings back your constraints, your(…)

Oracle 12c – Issues with the HEATMAP Segment even if the heat map feature is not used

By William Sescu When I don’t need I feature, I don’t turn it on, or do not use it because it reduces the possibility to run into issues. Most of the times this is true, however, during the preparation for(…)

Oracle 12c – RMAN list failure does not show any failure even if there is one

By William Sescu Relying to much on the RMAN Data Recovery Advisor is not always the best idea. In a lot of situations,  it tells you the right things, however, sometimes it tells you not the optimal things, and sometimes,(…)

Oracle – RMAN Backups to CIFS

By William Sescu Not to often, but sometimes you need to offload your RMAN backups and your DataPump exports to CIFS. You might run out of space on your NFS server, or you are a Windows shop who has only(…)

Oracle 12cR2 – RMAN cold backup with TAG’s

By William Sescu I am planning to backup my 12R2 container database, because a huge application change is coming up, and I want to be sure that I have a good RMAN backup beforehand. For that particular DB, I(…)

Oracle 12cR2 – DataGuard and Backups to NFS

By William Sescu From the RMAN point of view, you have generally two possibilities to store your backups, on Disk or on Tape. In case of a single instance, it doesn’t really matter from the accessible or inaccessible point of(…)

vagrant up – get your Oracle infrastructure up an running

By using Vagrant to manage your Virtual Machines and Ansible for configuration management and provisioning you can easily automate the setup of your whole test environment in a standardized way. If you have never heard about Ansible and Vagrant(…)