Month: May 2019

Cloud Services, Cloud Services | Exadata | Linux, Community, Events, Oracle Engineered Systems | Exadata

Workshop: Best Practices for Oracle DB on Exadata: RUN, It’s Free!

Hey, you in Porto Alegre/Brazil!

Don’t miss this opportunity to have an official Oracle Workshop about Exadata Best Practices for Oracle Database!

This is being being promoted by GUORS in partnership with Oracle Brasil.

Draft - Convite (1)

When? June 26th from 2PM to 6PM BRT.
Where?  TecnoPUC-RS, room 206 – building 99A
Instructor: Valter Rodrigues da Oracle Brasil.

LIMITED POSITIONS: 30!


Requirements:

1. Like GUORS Page on Facebook AND LinkedIn
2. Like Oracle University on LinkedIn
3. Like GUOB on LinkedIn
4. Bring your notebook.
5. Basic knowledge on RAC

Subscribe ASAP!

Database

Licensing: Remove Options During DB Creation

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Hi all,
So, let’s say you want to prevent yourself to violate Oracle licensing of your Enterprise Edition database… What a better moment to do it then when you are creating the database?

During database creation, there are several options that can be opted out. DBCA CLI has the option “-dbOptions” to disable options at will. For example, see below how to disable all the options.

dbca -silent -createDatabase -responseFile /home/oracle/dbca/dbca.rsp -dbOptions IMEDIA:false, CWMLITE:false, SAMPLE_SCHEMA:false, ORACLE_TEXT:false, APEX:false, OMS:false, DV:false, JSERVER:false, SPATIAL:false

If any of the options is required after the database has been created, let’s say you bought the license, you can simply look up on how to install them from Oracle Docs public documentation.

Hope it helps, cheers!

Database, Migration | Upgrades | Patching

DO NOT uninstall Database Vault from a CDB!

 

Hi all,

This is just a note for you that are now fully into database upgrades. As you may know, the Database Vault (DV) option could be reported as not installed in source when converting non-CDB to PDB, and the target CDB has the option installed. However, be aware that is not supported to remove DV option in multitenant (singletenant included) environments.

From Doc ID 2380950.1:

IMPORTANT:  Never run dvremov.sql on a container database (CDB) / Multitenant environment.  Doing so will cause serious problems when upgrading the PDBs.

 

In case you run dvremov.sql in a 12.1 multi-tenant DB, then the only option you might have is to restore the database to the state before running dvremov.sql. Assuming you have this backup, of course.

So stay sharp! 😀

Some references:
How To uninstall / install Database Vault in a 12c database ? (Doc ID 2112167.1)
DBA_DV_STATUS Is INVALID (Due to “ORA-00942: Table Or View Does Not Exist”) (Doc ID 2380950.1)

Database, Enterprise Manager

OEM Real-Time Data not Displayed

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Hi all,
So I was facing the follwoing situation in a client:
– SYS as SYSDBA passoword working to connect on database.
– Connecting to targets with this credentials working fine.
– However when loading real-time graphs it was simply not working.
– Tried to create manually the named credentials, still not working now with the error:

Listener refused the connection with the following error: ORA-12514, TNS:listener does not currently know of the service requested in connect descriptor.

See what I was getting from database home:

NewScreenshot 2019-05-09 às 11.34.33.png

Weird, but hey, the solution was already posted in Grepora!

Ok, I discovered anyway from MOS BUG 28513706 – 13c2EM: DB home page shows Connection Cache with this Cache Name does not exist. it miht be related to connection pools.
Even thought this was closed as not a bug, a learned a new workaround for it:

1. [OMS_HOME]/bin/emctl set property -name use_pooled_target_connections -value false 

2. Restart oms 

[OMS_HOME]/bin/emctl stop oms -all 

[OMS_HOME]/bin/emctl start oms

Hope it helps!
Cheers!

Cloud Services, Cloud Services | Exadata | Linux, Database, Tools

Oracle New Visual Online Tools

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Hi all,
So, after a long time of same old documentation style, Oracle started sharing some nice and visual pages for some specifics. Here are 2 examples:

1. Oracle Move to Cloud  (http://www.oracle.com/goto/move)
This one was shown to me by Ricardo Gonzalez, and it’s a GREAT tool if you are planning migrations to Oracle Cloud in general.

The part I like most is where you select the source and destination formats/versions you want and all recommended migration methods are suggested. Of course additional validation on database are required for each method, but it can potentially remind you of things you may be forgetting.

NewScreenshot 2019-05-08 às 16.56.46

Something else I like very much as well is the section with executive summaries of each migration tool. It’s basically ready for a print screen to put in the slides you are going to present to your boss… 🙂

NewScreenshot 2019-05-08 às 16.57.16.png

Also, you have handy some links to papers for the most different migration scenarios, as per:

NewScreenshot 2019-05-08 às 16.57.24

2. Oracle Database Features: (https://apex.oracle.com/database-features/

NewScreenshot 2019-05-08 às 16.52.14

And by selecting any of the features you can see more info in a very simple way, as per below. By the way, with one click you can be directed to the documentation (the old fashioned one):

NewScreenshot 2019-05-08 às 16.55.08

 

Hope you enjoy those as much as I did and hope Oracle continue providing those sort of interfaces to us!

Cheers!

Database, Performance

AWR Scripts List

Hey,
You also always need to lookup for the right AWR Script to run, just like me?

Here is a quick summary that may help you (and myself) in future. 🙂

@?/rdbms/admin/awrrpt.sql      --> basic AWR report
@?/rdbms/admin/awrsqrpt.sql    --> Standard SQL statement Report
@?/rdbms/admin/awrddrpt.sql    --> Period diff on current instance
@?/rdbms/admin/awrrpti.sql     --> Workload Repository Report Instance (RAC)
@?/rdbms/admin/awrgrpt.sql     --> AWR Global Report (RAC)
@?/rdbms/admin/awrgdrpt.sql    --> AWR Global Diff Report (RAC)
@?/rdbms/admin/awrinfo.sql     --> Script to output general AWR information

Hope it helps!
Cheers!