Linux

DBCA fails with ORA-27125 on 19c

Issue I recently encountered an issue where DBCA failed with ORA-27125 when creating a 19c database on Oracle Linux 7. Most of the support notes and posts on the internet pointed to Kernel parameters SHMMAX and SHMALL. The Kernel settings were fine on my...

How to Install VNC on Exadata Linux servers

Oracle Exadata servers do not come with VNC server installed. Let's look at how to install VNC on Exadata Linux servers. In this post, I will list the steps needed to get VNC working on Oracle Enterprise Linux 7 (OEL 7). There are many posts you can...

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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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SQLs slow in 19c

Issue We patched our...