Redis Cleanup and Memory Management in Kubernetes
A production-tested guide to keeping Redis healthy in Kubernetes: memory control, safe cleanup patterns, Sidekiq pitfalls, backups, and troubleshooting.
Tag: sidekiq
Debugging Transaction Deadlocks in Rails Tests: A Case Study
A Rails test suite hung intermittently until transactional tests, ActiveJob, and ActiveStorage turned out to be racing over the same locked rows.
Fixing Racing Background Job Updates: Rails to Laravel
How optimistic concurrency, unique job locks, and throttling stop out-of-order background job updates in both Rails/Sidekiq and Laravel queues.
Rufus-Scheduler vs Sidekiq-Scheduler for Ruby Jobs
Comparing rufus-scheduler's in-process polling loop with sidekiq-scheduler's Redis-backed queue to pick the right one for single-process vs distributed apps.
Inspecting Sidekiq Jobs from the Rails Console
Console-ready Ruby snippets to inspect Sidekiq queues, scheduled jobs, retry and dead sets, and currently running workers when the dashboard is not enough.
Redis Memory Spikes: Tracking Down a Runaway Sidekiq Queue
How I traced a Redis memory jump from 130MB to 800MB back to an unthrottled Sidekiq integration, and the maxmemory, eviction, and unique-job fixes that followed.
Redis in Ruby on Rails: Cache Server and Job Queue
Redis serves two very different roles in a Rails app, a disposable read cache and a durable job queue, and conflating the two causes real outages.
When the OOM Killer Silently Kills a Background Job
A missed notification email traced back to the Linux OOM killer terminating a Sidekiq job mid-run, leaving a stuck Redis lock and no error logged anywhere.