Services [not] Starting Automatically with CRS after Reboot?

Hello all! So, a client asked me to check why his database was not starting with CRS after a reboot. I started ...

OEM 13c Monitoring Features - Part 5, Best Practices and Automatic Incident Creation

T his is the fifth in a series of blog posts covering the most important topics you should know to completely monitor ...

OEM 13c Monitoring Features – Part 3, Reports Based on Metric Data

This is the third in a series of blog posts covering the most important topics you should know to completely monitor ...

Solving an unusual Oracle upgrade issue

Background I recently came across a very unusual situation. During an upgraded review, I noticed the ...

OEM 13c Monitoring Features - Part 2, Extended Metrics

This is the second in a series of blog posts covering the most important topics you should know to completely monitor ...

OEM 13c Monitoring Features - Part 4, Corrective Actions

This is the fourth in a series of blog posts covering the most important topics you should know to completely monitor ...

Use RMAN KEEP Backup To Roll Back From an Upgrade

There is a requirement to back up a database before an application upgrade to be able to rollback. Guarantee Restore ...

OEM 13c Monitoring Features: Part 1

This is the first in a series of blog posts covering the most important topics you should know to completely monitor ...

How to Automate Killing Inactive Sessions with Resource Manager

Problem Statement Are you manually (or via a script) killing idle sessions on your database? As a consequence, your ...

Automating Oracle Startup/ Shutdown on Linux (Non-Restart)

We have all set up automatic startup and shutdown of an Oracle Database on Linux at some point. I, myself, have made ...

An Introduction to Chaos Engineering: Trying to Break Stuff

Some time ago there was a car ad with the slogan "Don't use it, abuse it", meaning that no matter what you do to the ...

Azure Platform and Network Infrastructure Security fundamentals

How to Stop All Database Instances Running From ORACLE_HOME

At times, there may be a requirement to stop database instances, for example, to perform patching. When there is only ...

How To Downgrade Grid 19c Clusterware to 12.1

There may be many reasons for downgrading from Grid 19c to 12.1; however, the reason I am downgrading is to rerun a ...

Live Kernel Updates Without Downtime in New RHEL 8.1, 7.7 and 7.6 Release

Most often companies scheduling downtime for patching of the Linux kernel in a production environment follow strict ...

MariaDB Temporal Tables: Uncut & Uncensored (Part III)

(This is the third of a series of blog posts covering MariaDB Temporal Tables. The first and second in the series ...

Cluster Level Consistency in InnoDB Group Replication

When you have multiple database servers working together as nodes in a cluster, it’s beneficial to understand how data ...

Automatic Graceful Shutdown and Consistent Startup Method for Oracle DB on Linux

Having questions about automatic startup and shutdown is quite common when dealing with new environments or ...

AWS's Top 5 Commands: ALTER SYSTEM and Managing SYS Objects in RDS

Essential administrative commands for Amazon RDS for Oracle Navigating administrative limitations in RDS We often ...

How to Test Data Guard Fast-Start Failover by Shutting Down Standby Server

This post will demonstrate the procedure for testing Oracle Data Guard Fast-Start Failover by shutting down the server ...

Let DataGuard Broker Do ALL The Work

Why bother implementing the Oracle Data Guard Broker? The short answer is that it handles the heavy lifting of ...

How to fix dbupgrade script issue when upgrading Oracle Database Standard Edition

Objective: Upgrade Oracle database from 11.2.0.4 to 12.2.0.1

How to Test Data Guard Fast-Start Failover by Shutting Down Primary Server

This post will demonstrate the procedure to test Oracle Data Guard Fast-Start Failover by shutting down the server ...

How to Set Up Out Of Band Notifications in OEM 13C

So, after an abnormally quiet weekend, I was being paged: Oracle Management Services (OMS) was down! Well, this ...