this post was submitted on 05 Sep 2024
907 points (99.1% liked)
Programmer Humor
19176 readers
914 users here now
Welcome to Programmer Humor!
This is a place where you can post jokes, memes, humor, etc. related to programming!
For sharing awful code theres also Programming Horror.
Rules
- Keep content in english
- No advertisements
- Posts must be related to programming or programmer topics
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Just had to restart our main MySQL instance today. Had to do it at 6am since that’s the lowest traffic point, and boy howdy this resonates.
2 solid minutes of the stack throwing 500 errors until the db was back up.
If you have the bandwidth... it is absolutely worth it to invest in a maintenance mode for your system, just check some flat file on disk for a flag before loading up a router or anything and then, if it's engaged, just send back a static html file with ye olde "under construction" picture.
Bonus points if your static site sends a 503 with a retry after header.
That’s not really… possible at this point. We have thousands of customers (some very large ones, like A——n and G—-e and Wal___t) with tens or hundreds of millions of users, and even at lowest traffic periods do 60k+ queries per second.
This is the same MySQL instance I wrote about a while ago that hit the 16TiB table size limit (due to ext4 file system limitations) and caused a massive outage; worst I’ve been involved in during my 26 year career.
Every day I am shocked at our scale, considering my company is only like 90 engineers.
Is that the same database my user couldn't connect to today?