Why Oracle insists that every Exadata SGA lives in HugePages, what USE_LARGE_PAGES=ONLY really does, and a step-by-step guide to calculating, configuring and verifying HugePages.
Linux Kernel Settings for Consolidating Databases on Exadata
SHMMAX at 85% of RAM looks like it lets one database swallow all the memory. It doesn't. Here is how the shared memory and semaphore kernel parameters really work when you consolidate many databases on Exadata.
Patching Oracle Linux against CVE-2023-48795 Vulnerability on Air-Gapped Servers
We’ve all been there. That email from the security team lands in your inbox, or a routine scan flags a new, critical vulnerability. This time, it’s CVE-2023-48795, also known as the "SSH Terrapin Prefix Truncation Weakness." It sounds intimidating, and the thought of a man-in-the-middle attack. For many, the fix is straightforward. But what if … Continue reading Patching Oracle Linux against CVE-2023-48795 Vulnerability on Air-Gapped Servers
Introduction to Unix/Linux Administration
Oracle Linux 7.7 Installation on Oracle VirtualBox
Find the largest Top 10 Files and Directories on Linux/Unix
To find the top 10 files and directories in the current directory, we will use the "du" command with some options, along with the "sort" command to list the sizes in descending order, along with the "head" command to get only the top 10 items. Example:(output in K Bytes) Note the following "du" command options:-c … Continue reading Find the largest Top 10 Files and Directories on Linux/Unix
How to install Oracle Database 19c (19.3) on an Oracle Cloud Compute Instance (with Oracle Linux)?
Oracle Virtual Machines for Sale !
Are you looking for a virtual machine to do some hands-on labs or practice something (i.e. for Educational purposes}? Do you have the time to build these virtual machines yourself? Below are some really nice Virtual Machines, that I invested allot of time to build on Oracle Virtual Box, and that I used them personally … Continue reading Oracle Virtual Machines for Sale !
Oracle Single-Instance Database Creation in a Clustered Environment
Oracle Database 19c (19.3) Installation on the Oracle Cloud Compute Instance.
As, I already have access to one Oracle Cloud Free Compute Instance (Oracle Linux), then I decided to install Oracle database 19c there and create a test database. This time, I'll use a different technique by installing Oracle Database rpm.Oracle delivered the oracle database software as rpm for Linux since Oracle 18c. Installation procedure is … Continue reading Oracle Database 19c (19.3) Installation on the Oracle Cloud Compute Instance.