Monitoring Oracle Database using Prometheus

Lucas Jellema 1

Prometheus is a very popular framework for gathering metrics from a plethora of runtime components, recording, analyzing, visualizing them and making them available for companion technologies such as Grafana. Prometheus harvests information from ‘exporters’ – processes that expose an HTTP endpoint where Prometheus can scrape metrics in a format that […]

CQRS through Twitter – more fun than meaning

Lucas Jellema

As part of my 50 Shades of Data presentation, I talk about CQRS – Command Query Responsibility Segregation. The idea that you can have one or more read only data stores with data replicated from the master store where all data manipulation (commands) take place. In a different presentation, I […]

Dbvisit Standby upgrade

Roderick Christ

Upgrading to Dbvisit Standby 8.0.x Dbvisit provides upgrade documentation which is detailed and in principle  correct but only describes the upgrade process from the viewpoint of an installation on a single host. I upgraded Dbvisit Standby at a customer’s site with Dbvisit Standby in a running configuration with several hosts […]

When to use the Oracle Database In-Memory option?

The application and usage of the Oracle Database In-Memory has been described by Pom Bleeksma in this post. Oracle Database In-Memory can result in huge improvement in application query performance. This post will answer the question: “what would be an optimal situation for using the Oracle Database In-Memory feature?” The […]

Quick generation of a VirtualBox VM with Oracle Database EE on CentOS 5.6

Lucas Jellema 2

A short time ago, Oracle released Oracle Database 12c – release With a bunch of goodies that I would like to try out. This release can be downloaded from OTN: And subsequently I can create or clone a Virtual Machine, do the necessary preparations and run the installer. […]