When a materialized view refresh blocks production
How a routine PostgreSQL materialized view refresh blocked API requests and pushed a production database into a resource crisis.
personal notes
Notes from the terminal
Short, practical writing about programming, debugging, and the details that shape how code behaves.
AI answer
create_or_find_by and find_or_create_by are not the same in Rails
A short note on why these two Rails methods look similar but behave differently under concurrency.
find_sole_by in Rails
A simple note on using find_sole_by when your query should return exactly one record.
Increase laptop battery life with a charging threshold
A practical guide to using TLP and a charging threshold to reduce battery wear on Linux laptops.
performed? in Rails
A short note on using performed? to check whether a Rails action has already rendered or redirected.
Postgres advisory locks in Rails
A simple note on using Postgres advisory locks from Rails when only one process should run a critical section.