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MySQL Overselling: Why SELECT Isn't Enough and How SELECT... FOR UPDATE Solves It
4+ hour, 37+ min ago (431+ words) Imagine you’re running an online store, there’s exactly one item left in stock. Two customers click... Tagged with database, mysql, backend, softwareengineering....
Why Is Redis So Fast? Understanding the In-Memory Database
3+ hour ago (27+ words) Redis can deliver extremely low-latency reads and writes. Here’s how in-memory storage, persistence, data structures, and its mostly …...
The database connection pool was configured with 50 connections, so why did the 20th request time…
20+ hour, 7+ min ago (30+ words) The database connection pool was configured with 50 connections, so why did the 20th request time out? Understanding how parallel database queries inside a single HTTP request can exhaust your …...
Our users’ phones were the backup: rebuilding a lost database from app caches
20+ hour, 54+ min ago (223+ words) How expired cache entries on readers’ devices, server logs, and a year-old dump were merged back into MongoDB without …...
Remote Chat Failover Needs a Tab-Stop Origin Banner, Not a Skeleton Overlay
1+ day, 2+ hour ago (999+ words) I was halfway through a keyboard-only pass on a streaming chat when the local path died. A skeleton overlay covered the composer, my focus jumped, and tokens started arriving from somewhere else. Did the interface tell me those tokens had…...
Postgres for everything hits a wall the moment dashboards get concurrent
1+ day, 9+ hour ago (754+ words) I used to say, "Just use Postgres." After that, our dashboards became concurrent, and the read replica we quickly added to offload some of the pressure from the main database began overheating instead. There is a reassuring notion that Postgres…...
How Database Connection Pooling Actually Works
1+ day, 8+ hour ago (22+ words) Your database looks fine. Your app still hangs. Here's how connection pooling actually works and why the two aren't the same problem....
Virtual Threads After JEP 491: Your Bottleneck Just Moved to the Connection Pool
1+ day, 18+ hour ago (34+ words) If you turned on virtual threads in Spring Boot a couple of years ago and then quietly turned them back off …...
PostgreSQL MVCC: Why Bloat Doesn't Automatically Mean Expensive Reads
3+ day, 1+ hour ago (1407+ words) One of the most persistent misconceptions about PostgreSQL MVCC is that old row versions accumulate... Tagged with postgres, sql, database, mvcc....
Polygres: Advanced Search On PostgreSQL
3+ day, 2+ hour ago (51+ words) Programming book reviews, programming tutorials,programming news, C#, Ruby, Python,C, C++, PHP, Visual Basic, Computer book reviews, computer history, programming history, joomla, theory, spreadsheets and more....