I have two workloads on the same Kubernetes node, and they are using as much CPU as is available to them on the system, but one workload is a background/batch task whereas the other is serving traffic. What’s the best way to strictly prioritize the serving process in Linux/Kubernetes?

Sure, there can be leaps that I don't see coming, but at the moment we've thoroughly come to the point where claude code/cursor works really well when we understand and describe the problem well, but leaving the thinking to it, completely and utterly fails. Does anyone else see it this way?

We open sourced a read-through cache for S3, called Cachey github.com/s2-streamsto...

I was at a complete loss for words when the message reached me this morning. Cherish the time you have with your loved ones. Han, my friend, you will be dearly missed. I will never forget the memories we’ve built together. github.com/cncf/memoria...

We're excited to be at @rustconf.com 2025! Let's talk about profiling Rust with zero compromise! #rustconf25

We recently made some performance improvements to our Flame Graph by implementing backend pre-computation and viewport culling. Read more in our latest blog post: www.polarsignals.com/blog/posts/2...

Another step closer to making our next-gen storage engine generally available to our customers. Today's milestone: It's now on par with our old storage, while we still have tons of low-hanging and well-understood fruit!

What do you think of our (possibly controversial) take?

Do I know anyone who has an AMD 9955HX? I’d love to know how much faster it is at compiling rust than my M1 Max.

When you think you're just gonna fix a small bug and it turns out to take a week to understand and fix, but then you can't even ship it right away because it requires a data migration, which takes <retention period> of time. 🫠

Ok, I have a rant I have to let go of. If you generate a change to an open-source project fully with AI, didn't read, review, understand, and questioned it, then at least have the decency to say this on the PR description. You're stealing people's time by making them review it for you.

Kyaml is literally valid jsonnet. Can’t make this stuff up, y’all have had this (and more) since 2016 🤣 thenewstack.io/kubernetes-i...

Such an awesome feature! Catch a heap profile just before your Go process is just about to be killed by the OOM killer. (truly hooking into the kernel's OOMkiller with eBPF!)

Is there a good AI product that can learn from all slack-connect channels, discord and docs that I can then use to pre-prepare messages for customer support? I don't want the support itself to be autonomous, I want a human to approve or have the ability edit the message before the customer sees it.

JS isn’t slow, your code is. the way we disregard performance and exepect to be fast is one of our biggest problems.

We're excited to share that the Parca Agent now works offline! Store CPU profiles locally when disconnected, upload when ready. Because not all computing happens in data centers. Read how we built it: www.polarsignals.com/blog/posts/2...

What do folks use for Kubernetes configuration these days? (I do not accept Helm as the answer!)

Vortex is incredibly exciting, we’ve already made plans months ago to make it the primary format we will be storing our data in on object storage! www.linuxfoundation.org/press/lf-ai-...

New storage format RFC in the works 👀 Early preview:

A much requested feature finally shipping! Now you can finally understand why your process is taken off the CPU, whether for timing reasons, for I/O reasons, or any of the many other possibilities!

AI has gotten so good at coding it's frustrating how bad it is at novel, rare, low-level, or hard problems. Some days I'm flying with it, other days it's just complete and utter trash.

We make use of reproducibility properties a lot at Polar Signals. Here's how we do it for our next.js frontend(s).

Yeah, trust me, you want #continuousprofiling. 50% CPU improvement with a ~5-line code change. I often hear people say "we're not at that level of optimizing". I've not found one company this was true for, and you're missing out on opportunities like these.

Gonna try to make this the first week with my urchin keyboard as my daily driver!

🔥 Have you ever stared at a flame graph wondering why your app is slow? Using the new @PolarSignalsIO MCP, you can now ask "Why is my service slow?" and e.g. @anthropic.com's Claude Code or @cursor.com.web.brid.gy will analyze your production profiles and suggest code fixes.

We've made some *huge* advances with our new Rust-based database this week at Polar Signals. Getting really excited for customers to get to experience this next generation continuous profiling storage soon!

Super inspiring and lucky to be working with a team that produces incredibly high-quality work like this! DST allows us to move super fast, but with very high confidence that we're not going to lose data or any other devastating event that you don't want to happen in a database.

I've been building a 34 key split keyboard on the weekends and been practicing typing and adjusting my layout, and I'm really starting to enjoy this!

Haunted by that one production bug you just can’t reproduce? This talk is for you. At #EuroRust25, @asubiotto.bsky.social will show how deterministic simulation testing lets you find and replay bugs before they hit prod. 🧵1/3

I feel like I haven’t seen anyone post about it but can I just say that I love that GitHub actions are now light mode?

Our very own @asubiotto.bsky.social for the first time publicly talking about the DST approach we’re taking in our new database. (Blog post coming soon as well!)

Next blog post in our series of blog posts on the new database that we wrote!

On my way with @metalmatze.de to Systems Distributed '25! Excited for all the talks and seeing old and new friends!

🚀 Dive into Parca, the open-source Continuous Profiling tool that helps you optimize your application's performance. 🚀 Understand runtime costs for CPU, memory, disk, and network. Let’s get started! @rawkode.dev

We've been working hard to enhance our continuous profiling for GPUs. Learn about more metrics (like PCIe throughput) and the upcoming On-GPU profiles. If you are attending ai.engineer, come and stop by our booth S18 to discuss all of these features! www.polarsignals.com/blog/posts/2...

How much longer will clickhouse tolerate observability businesses building on it and compete with them? Clock is ticking I would say 😉 clickhouse.com/blog/clickst...

This is such a powerful feature! Understand not just the cumulative CPU time, but also the order of execution of your code!

We recently decided that we want to blog more about the process of how we research, what we find, and how we get to the final products we build at Polar Signals. Check out Tommy's post on researching PGO & Sampling profiling data. More research needed, but interesting finds so far!

If you're interested in how we blog at Polar Signals, the technologies that back it, and how we recently improved it, check out this blog post!

S2 now supports timestamps! 🕰️ How we made streams understand time: s2.dev/blog/timesta...

Do I know anyone with a 3D printer in Berlin that could print a few things in black PLA? 8 prints in total, super happy to pay for the material and electricity, of course! They're relatively small prints (cases for split keyboards).

Does anyone have a recommendation for an immigration attorney for someone from the US getting a work visa in Spain, and is hitting some processing delays they don't understand?

👀

I recently fell into a pretty deep rabbit hole of building low-profile custom split keyboards. My next build is going to be the "Urchin." The first time, I ordered a PCB directly from JLCPCB, and now I'm itching to design PCBs myself. Help. github.com/duckyb/urchin

Excited to release this! It's so cool to have the link to profiling data directly on the pull request!

So apparently, depending on the type of event that triggers a GitHub action, the `GITHUB_SHA` environment variable may not be the tip of your pull request 🙃 1.5 hours of my life that I'll never get back ...

Super excited to finally bring this awesome feature to the async Rust ecosystem!

I just made two Googlers aware of each other's work, and that made my day haha

We're updating our pricing to make it more predictable and transparent for customers!

Has anyone tried subframe.com and has opinions vs v0.dev? Looks pretty awesome!