How to Upgrade Oracle 12c to 19c on a Window Failover Cluster Manager environment

On this post we are going to upgrade Oracle 12c to 19c on an ACTIVE/PASSIVE setup on Windows Failover Cluster Manager: Server Name DBNAME 12c Oracle Home 19c Oracle Home win-rac1 DBPROD C:\oracle\app\product\12.1.0\dbhome_1 C:\oracle\app\product\19c\dbhome_1 win-rac2 DBPROD C:\oracle\app\product\12.1.0\dbhome_1 C:\oracle\app\product\19c\dbhome_1 This is the current patch level of both 12c and 19c homes (on both nodes!): Its worth... » read more

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Windows: How to Install Oracle 19c Database Software

These are the steps to install Oracle 19c Software. We are going to create ORACLE_HOME=C:\app\ORACLE\product\19c\dbhome_1 STEPS: 1:- Download software from here 2:- Unzip downloaded file on path C:\app\ORACLE\product\19c\dbhome_1 3:- Execute setup.exe from C:\oracle\app\product\19c\dbhome_1 4:- Follow GUI: That’s it, Oracle 19c Software installed

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ORA-38706: Cannot turn on FLASHBACK DATABASE logging.

We had this issue while trying to enable flashback: In our case this was due to “ORA-4031 When Enabling Flashback In 19c (Doc ID 2896925.1)”: Since this was just for a one-off activity Client wanted to implement, we did not put the solution as we wanted to better have teh memory available for the DB... » read more

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High Undo Tablespace Space Usage

We had this issue where undo space was not released even when having a low undo_retention (900). This was because TUNED_UNDORETENTION was very high: On this case, we followed “IF: Causes for High Undo Tablespace Space Usage (Doc ID 1951402.1)” and matched size with maxsize for the undo datafiles: After a few hours (changes are... » read more

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How to Upgrade Oracle Grid from 12c to 19c

This post will go though the steps needed to upgrade an Oracle Grid High Availability Services (HAS) from version 12c (12.1.0.2) to 19c (19.13.0) on a Linux environment. 1:- As per document Doc ID 2539751.1, Patch 28553832 is a prerequisite for both GI and DB Upgrade. Here the steps to apply Oct 2021 PSU which... » read more

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Oracle 12c: How to apply Oct 21 PSU – 12.1.0.2.211019

This activity is part of a GI upgrade from 12.1.0.2 to 19c, in which we need to apply latest PSU first, so here are the steps: 1:- Patches available here: 2:- (as ROOT) Update OPACH version to latest available. (p6880880_122010_Linux-x86-64.zip) 3:- (as ROOT) Run prepatch script. (RDBMS instances should be stopped first) 4:- GI patching:... » read more

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How to Configure: Oracle Database Native Network Encryption

Setting up Network Encryption in our Oracle environment is very easy, we just need to add these lines to the sqlnet.ora on server side: Ideally, on the client side we should add these too: But since ENCRYPTION_CLIENT by default is ACCEPTED, if we see this chart, connection would be encrypted (ACCEPTED – REQUESTED case) Lets... » read more

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