Top all-time · #14324
J-F Gagné
Personal blog · jfg-mysql.blogspot.comdataprogramming
J-F Gagné's personal blog at jfg-mysql.blogspot.com covers data and programming. Since 2017, 5 different Hacker News readers have linked it 5 times. It is still writing: the last post was on 2026-08-04, and you can follow it by feed.
Too few sampled comments (1) to say how often HN recommends it.?
Why HN links it
HN readers link this MySQL blog for its posts on database internals. One commenter cited a post about innodb_rows_read and rows examined as evidence that the counter is buggy, in a discussion of PlanetScale pricing.
Summarised by Claude from a sample of 1 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
What Hacker News says?
worse, theyre pricing is based on innodb_rows_read, even includes cached rows.. so every single ELT job costs $$$ based on how many rows you have, even if all in buffer pool cache already double-worse, innodb_rows_read known to be buggy! example https://jfg-mysql.blogspot.com/2022/03/rows-examined-not-tru... -- this bug is in customer's favor but what if other bugs are not?!
Comment linking /2022/03/rows-examined-not-trustworthy-because-index-condition-pushdown.html
on “ELT your data with PlanetScale Connect”Submitted How far can you go with MySQL or MariaDB? as a story · 80 points
HN discussionSubmitted Problematic Improved Offline Mode Error in MySQL 9 as a story · 1 points
HN discussionSubmitted Fixing low durability GTID replica with Voodoo as a story · 1 points
HN discussionSubmitted J-F Gagné's MySQL Blog: Write Set in MySQL 5.7: Group Replication as a story · 1 points
HN discussion