0 Upgrade Failure as Blessing in Disguise?
or The Findings of an Failed Enterprise Manager Upgrade to OEM13.3 When Oracle Enterprise Manager Cloud Control 13.3 (here just…
0 Collective Data Set and Equal Data Position between B2B Partners in Data Sharing Ecosystems – enter: Blockchain
Many organizations collaborate in one or more ecosystems: groups of organizations that work together in vertical chain or share common…
0 Correlation calls for Common Cause Consideration
Correlation is a powerful thing. When two metrics rise and fall in a similar way, surely that cannot be just…
0 Custom Log Parser in OMC Log Analytics to deal with Extended Logging in WebLogic Access Log
We recently enabled Extended HTTP Access Logging on our WebLogic Managed Servers. This adds the average response times and potentially…
0 Graceful shutdown of forked workers in Python and JavaScript running in Docker containers
You might encounter a situation where you want to fork a script during execution. For example if the amount of…
0 Smoke Escaping from a Black Box – how to tackle major production issues on a system that is not very transparent
This story is based on true events. It happened fairly recently.I was called into an organization that was experiencing performance…
0 Performance! 3 reasons to stick to Java 8 for the moment
It is a smart thing to move to newer versions of Java! Support such as security updates and new features…
0 Differences between CloudFormation, Terraform and Ansible in deployment of objects in AWS
In this article, I will deploy a simple solution in AWS in three ways: via the AWS templates of CloudFormation,…
0 Using ElasticSearch, Fluentd and Kibana (for log aggregation)
In my last article I described how I installed ElasticSearch, Fluentd and Kibana (EFK). [https://technology.amis.nl/2019/04/23/using-vagrant-and-shell-scripts-to-further-automate-setting-up-my-demo-environment-from-scratch-including-elasticsearch-fluentd-and-kibana-efk-within-minikube/] In this article I will…
0 The Pipelined Pancake Party – demonstrating the Power of Parallelization and Pipelining in JavaScript with Promises and Asynchronous Generators
This article is an attempt to demonstrate the performance gains – and programming elegance – that is at our disposal…
0 JavaScript Pipelining using Asynchronous Generators to implement Running Aggregates
As of ES 2018 (recent browsers or Node 10), JavaScript support asynchronous generators. Generators are functions that return a set…
0 Jupyter Notebook for retrieving JSON data from REST APIs
If data is available from REST APIs, Jupyter Notebooks are a fine vehicle for retrieving that data and storing it…
0 The Full Oracle OpenWorld and CodeOne 2018 Conference Session Catalog as JSON data set (for data science purposes)
Oracle OpenWorld and CodeOne 2018 are two co-located conferences that took place in October 2018. Some 2000 sessions presented by…
0 JavaScript Generators – How functions return a stream of results, yielding one result at a time
It was through inspecting some Python code that relied quite heavily that I suddenly realized the beauty of the ES6…
0 Using Vagrant and shell scripts to further automate setting up my demo environment from scratch, including ElasticSearch, Fluentd and Kibana (EFK) within Minikube
For training and demo purposes, on my windows laptop, I needed an environment with a guest Operating System, Docker and…
0 Newly released: Oracle Exadata X8-2 – bigger disks for saving money, expanding capacity
Earlier this month, Oracle announced the availability of the latest Exadata machine, the X8-2. As well as the option to…
0 Creating a Report of available ASM candidate disks from the OEM Repository
A while ago I was reviewing the metric extensions of our Enterprise Manager Cloud Control 13.2.0.0, we use to administer…
0 Extremely convenient way to run free Oracle Database 18c on your laptop – or anywhere else – using Vagrant & Virtual Box
Oracle Database 18c XE (eXpress Edition) is the free community edition of the enterprise edition of Oracle Database. Oracle Database…
0 INS-08106 using 12.1 dbua on a server with 12.2 databases
When you want to upgrade a 11.2 database to 12.1 on a (linux) server with 12.2 databases, you get a…
0 ADF Performance Monitor: Error Diagnostics
Application errors are often hard to retrieve, or take a lot of time to resolve. When you are suffering from…