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News
Inside HNSW: The Graph Algorithm That Makes Your AI Agent's Memory Fast (and Sometimes Wrong)
8+ hour, 7+ min ago (526+ words) Every time an AI agent calls something like memory.search(query, limit=5), a graph traversal runs underneath it that most developers never look at. It's not a database index in the traditional sense — it's closer to a probabilistic subway map,…...
PostgreSQL Duplicate Cursor (SQLSTATE 42P03)
23+ hour, 53+ min ago (624+ words) Pulse is now NeverBlink AI PostgreSQL raises ERROR: cursor "" already exists with SQLSTATE 42P03 (duplicate_cursor) when a DECLARE statement attempts to open a cursor using a name that is already held by an open cursor in the current transaction. The cursor must…...
One Migration, Start to Finish
13+ hour, 51+ min ago (1886+ words) New to this? Read the eight stages first. That page tells you which stage you are in and what to do about it. This page shows all eight happening on one real-shaped job, so it makes more sense second. By…...
What Data Migration Actually Is
13+ hour, 51+ min ago (856+ words) The work itself is simple to describe. A client is leaving an old system. Their history has to arrive in the new one, complete, connected, and correct. You get the data out, you line up every field with a home…...
Your Observability Stack Is Just a Database Decision in Disguise
11+ hour, 10+ min ago (1648+ words) Every team eventually has the same conversation. The bill arrives, someone screenshots it, and a thread starts in #engineering with a message that is some variation of: “we are paying more to watch the system than to run it.” Sampling…...
ENAMETOOLONG: how one dirty database field crashed our static build
16+ hour, 55+ min ago (193+ words) One day the build crashed with ENAMETOOLONG, file name too long. What we fixed. Two things. First, a length guard right in the address generator. Any address segment longer than a sane limit is dropped and the page is not…...
Idempotency and Retry in a Payment Core: Operations That Can't Be Duplicated and Can't Be Forgotten
17+ hour, 25+ min ago (25+ words) Idempotency and Retry in a Payment Core: Operations That Can't Be Duplicated and Can't Be... Tagged with fintech, performance, php, architecture....
Discover 10 practical SQL enhancements in Oracle 23ai that i | KuCoin
1+ day, 4+ hour ago (11+ words) Discover 10 practical SQL enhancements in Oracle 23ai that i kucoin.com...
Demystifying Vector Distance in PostgreSQL
18+ hour, 1+ min ago (288+ words) A look into sliding window comparisons for image analysis. When you need to perform complex similarity comparisons inside a database, you often have to bridge the gap between application-level data structures (like JSON) and low-level math (like vectors). The PostgreSQL…...
A Live Reverse Auction on Symfony: Anti-Sniping, Redis and Mercure SSE
13+ hour, 49+ min ago (439+ words) A live reverse auction looks simple: participants bid below the current price, the lowest bid wins. But once the auction goes live — with a countdown timer everyone sees and bids that must reach every participant instantly — the simple task turns…...