All
Articles 185,567Blog Posts 168,530Tech Tutorials 49,680Research Papers 36,206News 22,888
⚡ AI Lessons

Dev.to · TABATA Hitoshi
☁️ DevOps & Cloud
3w ago
Eight of my eighteen AWS scanners failed against a fake AWS — and that was the point
You cannot try a self-hosted AWS tool without an AWS account. That is a real wall: the thing needs...

Dev.to · TABATA Hitoshi
📊 Data Analytics & Business Intelligence
3w ago
pg_total_relation_size() takes a lock. My locks page waited behind the lock it was there to explain.
An ALTER TABLE is waiting on an idle transaction. Ten sessions are queued behind it. You open the...

Dev.to · TABATA Hitoshi
🔧 Backend Engineering
4w ago
pg_cancel_backend() returned true. The queue didn't move.
Ten sessions are stuck. You skip the slow-query hunt, do the hard part properly, and find the one...

Dev.to · TABATA Hitoshi
☁️ DevOps & Cloud
1mo ago
I deleted a queue and my own CLI told me a resource had been added
Last week I finally did something I'd been putting off for months: I pointed my AWS drift detector at...

Dev.to · TABATA Hitoshi
☁️ DevOps & Cloud
⚡ AI Lesson
1mo ago
My drift detector cried wolf every time my autoscaler scaled out — and the fix was a tag AWS already sets
A while back I wrote about the first time my self-hosted drift detector cried wolf: a diff bug that...

Dev.to · TABATA Hitoshi
☁️ DevOps & Cloud
⚡ AI Lesson
2mo ago
My infra tool could show drift, grade it, and Slack it — but it still couldn't fail a CI build
A while back I wrote about teaching my self-hosted drift detector to stop being pull — instead of...

Dev.to · TABATA Hitoshi
🔧 Backend Engineering
⚡ AI Lesson
2mo ago
A '12 libraries to make your Python production-ready' list crossed my feed — I use 2 of them, because a framework already made the other 10 decisions
A good list came across my feed: 12 libraries that turn a weekend script into production software —...

Dev.to · TABATA Hitoshi
☁️ DevOps & Cloud
⚡ AI Lesson
2mo ago
Your connection pool is exhausted. pg_stat_activity tells you which of the three causes it is.
There's a great genre of article about connection pools — size them (cores × 2), don't make them...
DeepCamp AI