Got to troubleshoot what is probably one of the weirdest/most interesting bugs of my career yesterday and today. This one is probably going to deserve a write-up. Thankfully, we heavily dogfood our product, and as a result, customers had no impact.

We care *deeply* (pun intended) about producing the highest quality data for our customers. Incomplete stacks are never great, check out this super fascinating write-up from Tommy on how we vastly improved unwinding of deep python stacks.

Been lightly using a gemma4 26B model with an mlx backend via lm studio and wow it’s incredibly good! Just for some random small chats, but it’s been surprisingly good.

Our new website was created by our friends at pixelpoint.io, highly recommend working with them, they did a phenomenal job! Let me know if you want an intro! polarsignals.com

Really excited about what Polar Signals Cloud can do in a world where more and more code is written by LLMs. Give the LLMs the context they deserve! Also: Check out our new slick website!

I wrote about our team’s code review norms, which I am grateful are deeply human.

We've been working on a major schema migration at @polarsignals.com that has unlocked some pretty wild improvements. Apart from a 50% (!!) reduction in storage size thanks to logical compression in vortex.dev, there has been a dramatic improvement in query performance.

Hey @anthropic.com, hear me out: Multi-player claude code sessions. Sharing the same claude code session with my team.

TypeScript users can now enjoy Polar Signals Cloud to the fullest as well!

Shout out to Cursor for (to my knowledge) being the only MCP OAuth client that implements token refreshes! It makes a huge difference for users not having to re-auth all the time.

/buddy off Fun idea, but in practice, annoying and distracting.

We caught up with @bwplotka.dev at KubeCon EU. He's excited about semantic conventions across OTel and Prometheus finally becoming practical, and AI tools changing how open source is built. #KubeCon #OpenTelemetry #Prometheus youtube.com/shorts/QF3Yk...

Periodic reminder that O(1) is not equal O(1). Your constant matters.

A historic step for profiling within the OpenTelemetry project!

We caught up with Felix earlier this week at KubeCon EU, and TODAY he's presenting on the OpenTelemetry profiling signal reaching alpha, together with Florian. 📍 15:15, Hall 8, Room F Profiling as a first-class signal in OTel is huge. Don't miss it!

@metalmatze.de and I are at KubeCon! Hit us up if you wanna chat observability and continuous profiling!

I'll be at KubeCon next week. I don't have many slots left, but if you wanna hang out or chat about profiling and all things observability! DM me, and I'm happy to find time!

At #QConLondon? Check out @asubiotto.com's talk on how we test our database(s) in an effort to not let critical bugs ever hit production! Today at 10:35AM GMT. Location Windsor (5th Fl.) Track Native Languages - and Wasm qconlondon.com/presentation...

See profiling data right in your IDE/texteditor! (*and* make it available to your favorite AI)

This one has been a long time coming, excited to finally have shipped it!

If you ever wondered how profilers work 🤓

There has been a really exciting movement in Kubernetes to actually acknowledge datacenter topology, and I don't see enough people talking about it. This one might seem small, but it opens up possibilities for applications needing to care about network topology. kubernetes.io/blog/2025/12...

I'm happy to share that I will be speaking at #QConLondon on March 16 on deterministic simulation testing at Polar Signals. For anyone interested in attending: SPEAKER60QUK26 for £60 off

We just made it even more convenient to use Polar Signals with your favorite AI!

Another @github.com outage? Actions not starting/reported.

#FOSDEM was a ton of fun this year! Check out our recap if you missed any of our talks! (also FOSDEM is always a better time if you don't catch fosdem-flu which thankfully I didn't this year!)

Do I know anyone who has successfully set up Google Workspace user sync and SSO with Azure (as in Google Workspace is the primary)? I could use some help (support has not been helpful).

Brennan telling #FOSDEM how to use Parca to profile Rust workloads!

Polar Signals at #FOSDEM 2026 day 2! Both talks in the Rust room. Profiling Rust applications with Parca Brennan at 12:30 @ UB2.252A (Rust) fosdem.org/2026/schedul... Frederic at 16:00 @ UB2.252A (Rust) Random seeds and state machines: An approach to DST in Rust fosdem.org/2026/schedul...

@thorfour.dev telling #FOSDEM about our new rust-based database (with lots of open source inside!)

@gnurizen.bsky.social showing us how we can get a memory profile just when your process is about to be killed by the OOM killer.

Very excited for this year's #FOSDEM! Lots of talks by Polar Signals folks:

Symbolization issues don’t have to be mysterious. Polar Signals Cloud now shows exactly what’s happening with your debuginfo, right from the flamegraph frame: www.polarsignals.com/blog/posts/2...

We've been working on something exciting in the Arrow/DataFusion ecosystem, which finally shipped with yesterday's release of DataFusion. You can now use Run-End-Encoded arrays in group by clauses! github.com/apache/dataf...

My EuroRust talk has been uploaded to YT! I cover how we architected our Rust database at @polarsignals.com as a set of state machines to enable deterministic simulation testing and catch hard-to-reproduce bugs before they hit prod.

What an awesome year at Polar Signals! Some highlights: 📈 >10x data scale ⚡️ Shipped always-on GPU profiling 🦀 Shipped our new Rust/DataFusion/Vortex DB Feeling lucky to get to work with such an incredible team & customers like Vercel, Notion, Canonical, Turbopuffer and more! 2026, we're ready!

We cut cross-zone traffic for SLO monitoring by 90% using Prometheus subquery optimization. The trick: pre-aggregate data locally instead of shuffling 55M raw samples to Thanos queriers. Coming soon to Pyrra! 🚀 www.polarsignals.com/blog/posts/2...

Just as I was thinking Unifi was getting ahead of Mikrotik, they release this absolute beast of a switch. Modern computing hardware is pretty awesome. mikrotik.com/product/crs8...

A simple 50-line code change saves us 30% of CPU across our whole infrastructure. This is the magic of system-wide profiling with @polarsignals.com. Easy to spot, easy to fix.

It's super easy to get started with profiling your NVIDIA CUDA workload, you don't even need to modify it!

Happy to share that I've been nominated to the Vortex Technical Steering Committee! It's been fun and productive switching to Vortex from Parquet as our storage format @polarsignals.com and I'm excited to continue contributing to the Vortex project. vortex.dev/blog/novembe...

We're big believers of USDTs at Polar Signals, and here is both a deep dive and a bit of detail on how we used them to build the NVIDIA CUDA Profiler we announced a few weeks ago!

Next.js 16 + turbopack took our frontend builds from 5-7m down to just over 2m. This means faster speed of iteration in development and faster CI. Performance is UX. Performance is DX. Performance is a feature.

🧊 New on the Polar Signals Blog — Our Delta Lake Fork Purpose-built for our continuous profiling product. In our latest post, we walk through how Delta Lake works, and the changes we've made to improve performance for our product. 👉 Read the full post: buff.ly/KwHINtO

another cloudflare outage?

I just realized that the feedback loop we created for our new database is its real superpower. Since *everything*, including the catalog, is on object storage, it allows us to validate/try out things super fast because everything can act independently against object storage.

Just the move from parquet to vortex gave us a massive perf boost. But more importantly, it opens up the path for way more. So much low hanging fruit now!

One of our most popular features, now available with nodejs! Also a sneaky customer reference 👀

It's so awesome that we can use our own product every single day at Polar Signals to understand our own software. I want to get into the rhythm and do more of these. What do you think? How would you have troubleshooted this, and could you have understood what's going on in less than 1min?

Good morning #KubeCon! We are excited to meet all of you and talk about performance! 🚀 Stop by our booth at 1360 next to the Demo Theatre to learn more about CPU, GPU, and memory profiling in production! 🧑‍💻