Tag:12c

SQLs slow in 19c

Issue We patched our Oracle databases to 19.9 and this issue started. Some of our SQLs were slow and...

How to rename a PDB in 19c

Let's look at how to rename a PDB in 19c. The steps are the same as 12c. Per Oracle note referenced below,...

Safely remove primary and standby databases in a Dataguard configuration

In this article, we will see how we can safely remove a clustered primary and standby databases that are in an Active...

Clean up after a database – using Oracle recommended ‘deinstall’ utility.

Often, we are faced with an empty ORACLE_HOME and deserted configuration, diagnostic, dump and log files. This is a common situation since...

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Removing Oracle Application Express (APEX) on 19c database fails

Oracle APEX Release 21.1.0 was released on May 12, 2021. My 19c Oracle Database came with Oracle...
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SQLs slow in 19c

Issue We patched our Oracle databases to 19.9 and this issue started. Some of...

Steps to remove OEM Agent

Recently I migrated all targets (Cluster, Databases, Instances, ASM, etc) and their jobs to a 13c OEM...

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