AJ Stuyvenberg
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ajs.bsky.social
AJ Stuyvenberg
@ajs.bsky.social
AWS Hero

Staff Eng @ Datadog
Streaming at: twitch.tv/aj_stuyvenberg
Videos at: youtube.com/@astuyve
I write about serverless minutia at aaronstuyvenberg.com/
Yeah of course
September 18, 2025 at 2:13 PM
This includes full Datadog tracing/logs/metrics by the way.

There's no compromising on observability, not even cold starts.
September 18, 2025 at 1:03 PM
The faster your cold starts are, the cheaper these will be!
August 5, 2025 at 5:51 PM
Yeah!
August 1, 2025 at 8:43 AM
That said, I'm excited to share that @Datadog's Serverless monitoring product now supports LWA!

Thanks to Harold and AWS Labs for collaborating with us on the PRs, and huge thanks to Alex Gallotta for driving this work.
July 30, 2025 at 5:43 PM
I'm a big fan of continuous profiling/measuring your software against real world use cases. This is also how I often learn about in to new system changes in AWS early, heh.

Great episode of Software Huddle w/ @alexbdebrie: www.youtube.com/watch?v=JAw9...
Operational Excellence Is the Moat with Sam Lambert
Today, Sam Lambert from Planetscale is back for a third time. Planetscale just announced Planetscale Postgres, so we had to get Sam back to tell us how and why they decided to add support for Postgres. It's always great to have Sam on -- he brings great stories about real customers and honest insight about the state of the database industry. In this episode, we talk about the road to Postgres and how operational excellence is the only true advantage in database providers. Sam walks us through the current Planetscale Postgres offering, along with details on Nova, a new sharded Postgres project that Planetscale is working on. Along the way, we get updates on Planetscale Metal, how demand has been for Planetscale Postgres, and future plans for Planetscale. *Timestamps* 01:16 Start 06:37 The Timeline 15:15 Not Much IP in the Database Market 21:48 PSBouncer 24:17 Zonal affinity 27:38 Query Insights 29:34 How to sign up 32:02 Convex 34:37 Other data stores? 56:18 Acquisitions
www.youtube.com
July 28, 2025 at 2:59 PM

In our case the secret is a Datadog API key which isn't required until we actually flush data, so deferring it to that point saves us over 50ms.
July 22, 2025 at 3:31 PM
50% lol was not reading the profile carefully
July 18, 2025 at 4:45 PM
By switching to a memory arena, we preallocate a slab of memory and virtually eliminate the linear growth of malloc syscalls, which cuts down kernel mode switches, improving latency.

Thank you profiling (and jemalloc)!
July 18, 2025 at 3:07 PM
Now writing a job to a log and then using a subscription filter to run them async is deeply fucking cursed though omg
July 17, 2025 at 5:01 PM
I think OP's intentions were pretty pure until they felt they were mistreated by AWS. So many people end up taking to social media in those instances so in my opinion it was mostly fine.
July 17, 2025 at 5:01 PM
Thanks Corey!
July 17, 2025 at 4:41 PM
cc @quinnypig.com, as I saw this post in your newsletter
July 17, 2025 at 4:25 PM