Home page - Erwin Vrolijk

How to fully remove Command Line Tools for Xcode

Unknown — Sat, 13 Dec 2025 00:00:00 +0000

It can be confusing on how to completely remove the Command Line Tools for Xcode. Let me guide you through this process, step by step.

Data Persistence in the OpenTelemetry Collector

Unknown — Wed, 18 Jan 2023 00:00:00 +0000

What happens if the OpenTelemetry collector cannot send data? Will it drop, queue in memory or on disk? Let's find out which settings are available and how they work!

Use OpenTelemetry to Auto Instrument WordPress

Unknown — Tue, 01 Nov 2022 00:00:00 +0000

OpenTelemetry is often associated with modern microservices and cloud-native applications. What happens if we apply OpenTelemetry and modern observability techniques to something completely different?

Where is the OpenTelemetry RFC?

Unknown — Tue, 24 May 2022 00:00:00 +0000

In one of my talks about OpenTelemetry I got a great question: Where is the RFC of the OpenTelemetry protocol? I've found the answer for you.

Linear regression in sqlite

Unknown — Wed, 06 Jan 2021 00:00:00 +0000

Linear regression is a very simple, powerful tool to predict the future. Especially when directly implemented in sqlite.

3 important things to know to improve your cappuccino

Unknown — Mon, 12 Oct 2020 00:00:00 +0000

It's fun to make coffee with my simple espresso machine. The current work from home era allows me to learn a lot by practice.

And I've practiced my milk frothing a lot lately.

IT Operations – Towards automation and predicting

Unknown — Mon, 01 Jul 2019 00:00:00 +0000

'I have been helping customers with IT Operations issues for many years. One common pattern is to use Splunk as a central analytics platform. It can accelerate IT processes and make them more efficient' , Product Manager Erwin Vrolijk explains.…

Splunk eventgen now supports negative values

Unknown — Fri, 15 Feb 2019 00:00:00 +0000

The Netherlands is a country with a lot of water. A big part of the country is even below sea level. And we even have a branch of government whose only concern is water management, water boards</a>.
I had the opportunity to show one of the boards how their work could be more efficient… 

4 Tips to write a great use case

Unknown — Thu, 01 Nov 2018 00:00:00 +0000

The way to prepare an organization for a data-driven future is to collect use cases. These small business cases describe: which decisions you took, what data you need, and how this contributes to the strategic objectives of the organization.
Let me tell you the four essential, most overlooked steps… 

Machine Learning & Algorithms

Unknown — Wed, 01 Aug 2018 00:00:00 +0000

Research on Artificial Intelligence already started in the seventies. Because of this, it is possible for a computer to learn something. A computer can now make predictions or recognize objects based on examples. 

Machine Learning for Dummies

Unknown — Sun, 01 Jul 2018 00:00:00 +0000

Machine Learning is a way to explain a computer what to do. You can’t just direct summon a computer do perform a task. That is why you give instructions on how to recognise relations and how features are recognized. 

A fresh look at IT and business services

Unknown — Tue, 01 May 2018 00:00:00 +0000

The last couple of years, we have seen several fantastic developments in the world of IT, systems are more and more being integrated (hyper converged) and standardized. At first sight this is great… 

Image uploading fixed for Wordpress IOS-app

Unknown — Mon, 24 Jan 2011 00:00:00 +0000

We are using Wordpress</a> in a not so common configuration: our installation is hosted with a self-signed ssl cert, and behind http-auth. With this setup image uploading fails when using the IOS app</a>. 

Small bug fix in wordpress plugin

Unknown — Tue, 18 Jan 2011 00:00:00 +0000

In the wordpress</a> CMS, a thumbnail can be added to a post. You have to add this thumbnail manually to a post, even when the post contains an image.
The 'Automatic Post Thumbnail</a>' plugin automates the addition of thumbnails to posts.

Quarters added to org-mode

Unknown — Mon, 29 Nov 2010 00:00:00 +0000

Org-mode</a> is part of the emacs text editor</a>. It is a versatile ToDo-list manager, project planner, life manager. Org-mode has the ability to show information grouped by day, week, month or year. I added grouping by quarters to this list. 

InPlaceRichEditor autosize patch

Unknown — Tue, 01 Jul 2008 00:00:00 +0000

In the 1.3 version of InPlaceRichEditor, a script which enables TinyMCE</a> to be used as a edit in place</a> editor, lives a patch I created.
This patch assures the TinyMCE editor is the same size as the text to be edited.