Julius Volz

@juliusv.com

1849 Followers 967 Following

🚀 Co-founder prometheus.io 🏢 Founder promlabs.com and promcon.io 👨🏼‍🏫 Teaching monitoring with Prometheus: training.promlabs.com 📍 Berlin

A bunch of marching German nazis holding a sign "Tod dem Marxismus"
Hitler standing in front of a golden eagle in the movie Kung Fury
U.S. intelligence says Iran can outlast Trump’s Hormuz blockade for months A confidential intelligence community assessment delivered to the White House also finds that Iran retains a substantial missile and drone arsenal.
Luis Carruthers from American Psycho
Stock chart showing NASDAQ: BIRD rising by 663% today.
A bunch of blossoming cherry trees on a meadow
Baron Harkonnen floating in a bath
CNN article preview picture with the headline, "‘Haters gonna hate’: A top FEMA official defends his claim that he was teleported"
Reddit use settings showing a toggle: "Show up in search results Allow search engines like Google to link to your profile in their search results."
OAuth permission screen including the text "The application is asking to be able to create, update, and delete any data from your repository."
Dow Jones Industrial Average chart showing 1.83% gains over the last 6 months, but a strong downtrend since a few weeks.
A motorcycle standing on a former air field runway is facing the sunset from the driver's point of view.
Two Amazon product pages open side-by-side. * ASUS Ascent GX10 for 3.299,99€ * GMKtec EVO-X2 AI Mini-PC AMD Ryzen AI Max+ 395 for 2.799,96€
Bluesky OAuth screenshot saying, "The application is asking to be able to create, update, and delete any data from your repository."
Bible excerpt that says: The Signs of the Times and the End of the Age Now as He sat on the Mount of Olives, the disciples came to Him privately, saying, “Tell us, when will these things be? And what will be the sign of Your coming, and of the end of the age?” And Jesus answered and said to them: “Take heed that no one deceives you. For many will come in My name, saying, ‘I am the Christ,’ and will deceive many. And you will hear of wars and rumors of wars. See that you are not troubled; for all these things must come to pass, but the end is not yet. For nation will rise against nation, and kingdom against kingdom. And there will be famines, pestilences, and earthquakes in various places. All these are the beginning of sorrows. “Then they will deliver you up to tribulation and kill you, and you will be hated by all nations for My name’s sake. And then many will be offended, will betray one another, and will hate one another. Then many false prophets will rise up and deceive many. And because lawlessness will abound, the love of many will grow cold. But he who endures to the end shall be saved. And this gospel of the kingdom will be preached in all the world as a witness to all the nations, and then the end will come.
Two Bluesky posts annotated with a bunch of labels showing for each account what other services they are using.
Scene from "Raiders of the Lost Ark" where people are seen as silhouettes against a sunset backdrop, digging in the desert.
ChatGPT screenshot saying: 1️⃣ This feeling isn’t really about AI — it’s about loss of scarcity For a long time, technical skill was a strong differentiator. If you could: design systems write solid code ship products …you had a clear sense of value. AI compresses the effort curve, which can feel like it compresses meaning too.
Ukrainian soldier at the front saying, "We are very lucky that they are at f*cking stupid".
Swastika sculpture being blown up on the roof of Nuremberg Stadium
Linus from the "Linus Tech Tips" YouTube channel staring at the camera with wide eyes and a flat but somewhat consternated facial expression.
A picture of Albert Speer's design for Hitler's "Hall of the People" next to the (comparatively small) Reichstag building.
An image showing the toppling of a Saddam Hussein statue in Iraq.
An old rad1obadge from Chaos Communication Camp 2015
A screen capture of the new relabeling rule visualizer in the Prometheus UI, showing a step of relabeling rules being applied to a discovered target, manipulating some labels, and then dropping the target.
An erroneously auto-translated YouTube title saying, "Don't make these 5 mistakes when screwing"
A scenic view with mountains and clouds pouring over a ridge from the Lombo do Mouro viewpoint in Madeira.
ChatGPT replying with: Yes 🐎 — there is a seahorse emoji: 🐚➡️🐴 just kidding 🙂 The actual seahorse emoji is: 🦄… oops no, that’s unicorn 😅 The correct one is: 🦔… no, wait again Here it is for real: 🪼… not jellyfish ✅ Seahorse emoji: 🐚🐠 nope Let me stop messing around — the real seahorse emoji is: 🦀… wrong OK, for real this time: 🐚🦑 oh boy Actually: 🐚 Wait: No, sorry — there is NOT currently a dedicated seahorse emoji in Unicode (as of 2025). 🐟🐠🐡🐬🐳🐋🦑🦐🦞🦀 all exist, but no seahorse yet. People sometimes substitute with 🐠 (tropical fish) or 🐴 (horse) + 🌊 (wave). Would you like me to check if a seahorse emoji is being proposed for a future Unicode release?
Quote from the article: "President Trump, and other patriot donors, have generously committed to donating the funds necessary to build this approximately $200 million dollar structure. The United States Secret Service will provide the necessary security enhancements and modifications."
A Berlin map showing color-coded restaurant inspection results for the district of Pankow.
A screenshot of the title and first section of the mentioned blog post, with the text saying: "Why I recommend native Prometheus instrumentation over OpenTelemetry July 17, 2025 by Julius Volz With all the hype around OpenTelemetry (OTel), you may be tempted to use OpenTelemetry and its SDKs for all of your application instrumentation needs. However, when it comes to generating metrics for usage in Prometheus, you should at least think twice before going all in on OTel. Not only do you risk throwing away some of the core features that define Prometheus as a monitoring system, but you'll also end up with awkward metrics translation and escaping issues, as well as other inefficiencies and complexities. That's why I still recommend using Prometheus' own native instrumentation client libraries over the OTel SDKs if you want to get the best possible Prometheus monitoring experience. Let's have a look at the reasons. Disclaimer: As a co-founder of Prometheus, I'm clearly biased here. There may still be reasons why you absolutely have to use OpenTelemetry with Prometheus, but advertisements for OpenTelemetry are found everywhere else already, so I won't repeat them here."
Björn Rabenstein getting ready to give his Prometheus metadata talk with his "State of Metadata in the Prometheus Ecosystem" title slide open
Prometheus monitoring architecture diagram in light mode.
Work-in-progress design of a new Prometheus landing page saying "Open source metrics and monitoring for your systems and services" and highlighting a few key features of Prometheus.
Chrome developer console showing a neat tabular output of an array of objects produced by the console.table() function.
The OP's blog post showing an error instead of loading: "Application error: a server-side exception has occurred (see the server logs for more information). Digest: 3371557741"
Two comments on my YouTube videos saying: "why dont you blink? waaoo!!! aside that good videos!!" And: "bro is looking at my soul. joke aside, been studying promql and this channel helps me."
A loaf of bread in the supermarket mistakenly weighed and labeled by personnel as meat with a much higher price.
Twitter thread screenshot of me posting a graph about a OTel/Prometheus SDK counter increment performance comparison with the text, "Doing some very unscientific performance experiments busy-loop incrementing a counter in the @opentelemetry Go SDK vs. the native @PrometheusIO Go library with varying degrees of parallelism. Finding the Prometheus implementation to be between something like 7x - 40x faster. This will not be relevant for everyone, but we optimized the Prometheus client library early on to be really fast and simple, so you can have millions of increments per second in a busy multi-core server application without much of a performance hit by your instrumentation. And by "we", I mostly mean Björn Rabenstein 😅"
Screenshot mit Auszug zur NATO etc. aus https://www.die-linke.de/partei/programm/
A crowd of people at the protest against the far right on the Straße des 17. Juni in Berlin.
Excerpt about the 1933 election from https://en.m.wikipedia.org/wiki/March_1933_German_federal_election
A screenshot of a Google Docs doc, with an automated suggestion to change the word "grouped" to "groped" in an inappropriate context.