![DML Operations over Standby in Active Dataguard [19c feature]](https://project42.site/wp-content/uploads/2020/12/DML-Redirect-360x240.png)
One of the new Features for 19c database is the possibility to execute DML operations (INSERT, UPDATE, DELETE…) over a Standby in a Active Dataguard configuration. The operation itself won’t be actually executed in the standby, but redirected to the primary where will be executed and then apply in the standby by the Recovery Process.... » read more
![Standby Automatic Flashback [19c feature]](https://project42.site/wp-content/uploads/2020/12/Automatic_flashback-360x240.jpg)
One of the new Database 19c Features is the possibility of automatically Flashback the standby database if the Primary has been Flashback. There are couple of requisites though, the Standby has to have Flashback enabled, and in order for the Automatic flashback to start, the standby has to be mounted Lets do a quick test... » read more
![The New AUTO_ONLY option for USE_LARGE_PAGES parameter [19c feature]](https://project42.site/wp-content/uploads/2020/10/Screenshot-2020-10-31-at-15.08.03-360x240.png)
Setting up the memory of a Database is always a process that requires planification, specially if you want to get the maximum of your server and setup Memory Huge Pages in your Linux system, which is recommended. The concern is that other applications/processes wont be able to use that portion of memory, causing instability if... » read more
Converting a Physical Standby Database to Snapshot Standby can be of a great solution if you need to do some new code test in a system but you can’t have a full Test Clone. Also, since the standby is a block by block copy of the Primary, we are making sure the test is made... » read more
I already mentioned that Autoupgrade allows now to be used in RAC Databases, but something that was also added recently (Autoupgrade 19.9.0 if I’m not mistaken) is the capacity to upgrade a Non-CDB database and plug-in it into a higher version Multitenant Database you already have in the system. You can see the needed configuration... » read more
![Create RAC Standby Database Using DBCA [19c Version]](https://project42.site/wp-content/uploads/2020/08/Standby_DBCA_RAC-360x240.png)
DBCA evolves the same way than most Oracle Components, and since 12.2 version, you can create Standby Databases directly using DBCA. Before you start, is important to check your version limitation, so for example, 12.2 only allows single instance Databases to be created (see this article by Frank Pachot [https://blog.dbi-services.com/12cr2-dbca-can-create-a-standby-database/]), but that is not longer... » read more
![Create Single Instance Standby Using DBCA [12.2 Version]](https://project42.site/wp-content/uploads/2020/08/Standby_DBCA-360x240.png)
Since 12.2, dbca can create Standby Databases directly, but with some restrictions, like only for Single Instance Databases and only non container Databases. This has changed for each version, and since 18c, you can create the RAC Standby and they can have PDBs (will have an article about that soon 🙂 ) For this test,... » read more
![Create Standby using RMAN Duplicate [12.2 Version]](https://project42.site/wp-content/uploads/2020/08/Standby-360x240.png)
While I was starting another project, I realised I don’t have any post covering Standby Database creation. Everyone has their own way of doing things, but last time I needed to create one, this was how I ended up doing it. The Primary Database will be called TEST and run in RAC1 cluster (rac1-node1 /... » read more
![Fixing No-logging corruption the easy way [12.2 feature]](https://project42.site/wp-content/uploads/2020/08/nologging-360x240.gif)
I have recently discovered a new way to easily fix nologging corruption in a standby which version is 12.2 or higher. The first thing we need to do for this test is to disable the force logging parameter from our Primary Database db1221 > select name,force_logging from v$database; NAME FORCE_LOGGING ________ ________________ DB122 YES db1221... » read more