The Hidden Blog

As it turns out, I do have a hostname.

2024 Dim Sum Labs: Hackerspace in Hong Kong

One of my favorite discoveries when staying in Hong Kong in the past two years was the hackerspace “Dim Sum Labs” (DSL). It is the first of its kind in the city and opened its doors in 2010.

I initially discovered it via their weekly “HackJam” listed on Meetup. It’s a...

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2024 Lock Contention on Google Cloud SQL and Postgres

I recently looked into some performance issues on a large PostgreSQL 13.12 instance. One part of that was to make sure we don’t have too much locking going on in busy tables.

Locking metrics on the Cloud SQL dashboard

Locking metrics on the Cloud SQL dashboard...

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2023 Two months in Hong Kong

In 2023 I spent two months in Hong Kong, here’s a small subset of places that I remember and liked. More inspiration for places to visit are in my vlog episodes I shared in a previous post. There’s a lot of things missing but half the fun is finding places yourself anyway.


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2023 Vlogging

This year I started playing around with creating video content. The goal was to create low-effort semi-frequent video summaries of what I have been up to. I didn’t want to do narration or anything else that would raise the barrier of publishing a video.

All videos are available on my YouTube channel...

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2023 New music in my email inbox

In the past years I came to the realization that I don’t discover new music any more. Now I see new albums if they show up on my “Listen Now” view in Apple Music and stream them there.

Many years ago I was a heavy user of Gazelle-based websites. These have the advantage that they...

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2023 Taking a look at Nostr

After hearing about Nostr from multiple people over the past weeks I decided to take a look and learn more about it. I found, and to be helpful to get an initial overview.

Running a nostr relay

As a next step I looked into setting...

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2023 Fixing failed installation of EPSON printer driver

Recently I ran into the issue where installing an EPSON SC-P900 printer driver on macOS (before and after the update to Ventura) always failed with a generic “Installation failed” message.

I started my investigation by looking at the installation log with the following command while...

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2022 Convert video for Twitter

If you want to post a video on Twitter there’s a few rules that are important for the video to be accepted.

Unfortunately the interface will only show “The video file is not compatible” while only the actual API request in the background will tell you exactly what is wrong. If you...

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2022 Push notifications from AppSignal with Pushover

I’m using AppSignal to monitor Birdfeeder. Birdfeeder’s job is to send your Twitter bookmarks to your email inbox so you don’t forget about them.

On the technical side it’s a Rails app which relies on Sidekiq to process background jobs. Bookmarks have to be fetched, accounts...

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2022 Building container images in Kubernetes with kaniko

A few weeks ago I rebuilt a GitLab CI pipeline at JustWatch. One part of that was to move the step building the container images in the Kubernetes cluster from artificer to kaniko.

I wrote up a short guide on the JustWatch blog in case you are curious.