Ardent Performance Computing
Jeremy
Openclaw is Spam, Like Any Other Automated Email
Open Source communities are trying to quickly adapt to the present rapid advances in technology. I would like to propose some clarity around something that should be common sense. Automated emails are spam. They always have been. Openclaw (and whatever new thing surfaces this summer) is no different. Policies saying automated emails/messages are banned – … Continue reading
The Scott Shambaugh Situation Clarifies How Dumb We Are Acting
Edit: related blog published Feb 22 – Openclaw is Spam, Like Any Other Automated Email My personal blog here is dedicated to tech geek material, mostly about databases like postgres. I don’t get political, but at the moment I’m so irritated that I’m making the extraordinary exception to veer into the territory of flame-war opinionating… This … Continue reading
Postgres client_connection_check_interval
Saw this post on LinkedIn yesterday: I also somehow missed this setting for years. And it’s crazy timing, because it’s right after I published a blog about seeing the exact problem this solves. In my blog post I mentioned “unexpected behaviors (bugs?) in… Postgres itself.” Turns out Postgres already has the fix; it’s just disabled … Continue reading
How Blocking-Lock Brownouts Can Escalate from Row-Level to Complete System Outages
This article is a shortened version. For the full writeup, go to https://github.com/ardentperf/pg-idle-test/tree/main/conn_exhaustion This test suite demonstrates a failure mode when application bugs which poison connection pools collide with PgBouncers that are missing peer config and positioned behind a load balancer. PgBouncer’s peering feature (added with v1.19 in 2023) should be configured if multiple PgBouncers are being used … Continue reading
Postgres Booth at PASS Data Community Summit
PASS Data Community Summit 2025 wrapped up last week. This conference originated 25 years ago with the independent, user-led, not-for-profit “Professional Association for SQL Server (PASS)” and the annual summit in Seattle continues to attract thousands of database professionals each year. After the pandemic it was reorganized and broadened as a “Data Community” event, including … Continue reading
KubeCon 2025: Bookmarks on Memory and Postgres
Just got home from KubeCon. One of my big goals for the trip was to make some progress in a few areas of postgres and kubernetes – primarily around allowing more flexible use of the linux page cache and avoiding OOM kills with less hardware overprovisioning. When I look at Postgres on Kubernetes, I think … Continue reading
Explaining IPC:SyncRep – Postgres Sync Replication is Not Actually Sync Replication
Postgres database-level “synchronous replication” does not actually mean the replication is synchronous. It’s a bit of a lie really. The replication is actually – always – asynchronous. What it actually means is “when the client issues a COMMIT then pause until we know the transaction is replicated.” In fact the primary writer database doesn’t need … Continue reading
Sanitized SQL
A couple times within the past month, I’ve had people send me a message asking if I have any suggestions about where to learn postgres. I like to share the collection of links that I’ve accumulated (and please send me more, if you have good ones!) but another thing I always say is that the … Continue reading
Seattle Postgres User Group Video Library
Are you in the Pacific Northwest? Since January 2024 we’ve been recording the presentations at Seattle Postgres User Group. After some light editing and an opportunity for the speaker to take a final pass, we post them to YouTube. I’m perpetually behind (I do the editing myself) so you won’t find the videos from this … Continue reading
Testing CloudNativePG Preferred Data Durability
This is the third post about running Jepsen against CloudNativePG. Earlier posts: First: shout out to whoever first came up with Oracle Data Guard Protection Modes. Designing it to be explained as a choice between performance, availability and protection was a great idea. Yesterday’s blog post described how the core of all data safety is copies of … Continue reading
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contact: schneider @ ardentperf.com
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