music_library/backlog/completed/ml-95 - Process.sleep-for-rate-limiting-in-Oban-workers.md

id, title, status, assignee, created_date, labels, dependencies, references, priority

id	title	status	assignee	created_date	labels	dependencies	references	priority
ML-95	Process.sleep for rate limiting in Oban workers	Done		2026-04-20 08:58			https://github.com/cloud8421/music_library/issues/79	medium

Description

GitHub: created 2026-02-17 · updated 2026-03-02 · closed 2026-03-02

Priority: Medium

Description

Three workers use Process.sleep to rate-limit API calls:

Worker	File	Sleep
ArtistRefreshMusicBrainzData	lib/music_library/worker/artist_refresh_music_brainz_data.ex:8	500ms
ArtistRefreshDiscogsData	lib/music_library/worker/artist_refresh_discogs_data.ex:8	1000ms
RecordRefreshMusicBrainzData	lib/music_library/worker/record_refresh_music_brainz_data.ex:12	500ms

This blocks the worker process during the sleep, preventing Oban from using it for other jobs.

Expected behavior

Consider using Oban's rate_limit plugin or queue-level concurrency limits instead.

Source

From technical debt audit (2026-02-17), item #6.