yaml ruby 30 lines · 2 tabs

Background job scheduling with sidekiq-scheduler

Alex Kumar Jan 2026

2 tabs

cleanup_expired_sessions:
  cron: '0 2 * * *'  # Daily at 2 AM
  class: CleanupExpiredSessionsWorker
  queue: low
  description: Remove expired sessions from Redis

send_daily_digest:
  cron: '0 9 * * *'  # Daily at 9 AM
  class: SendDailyDigestWorker
  queue: default
  description: Send daily digest emails to active users

refresh_trending_cache:
  cron: '*/15 * * * *'  # Every 15 minutes
  class: RefreshTrendingCacheWorker
  queue: default
  description: Update trending posts cache

class CleanupExpiredSessionsWorker
  include Sidekiq::Worker

  sidekiq_options queue: :low, retry: 3

  def perform
    cutoff_time = 30.days.ago

    expired_count = Session.where('updated_at < ?', cutoff_time).delete_all

    Rails.logger.info("Cleaned up #{expired_count} expired sessions")
  end
end

2 files · yaml, ruby Explain with highlit

Recurring tasks like cleanup jobs, report generation, or cache warming need reliable scheduling. The sidekiq-scheduler gem extends Sidekiq with cron-like scheduling without requiring separate infrastructure like cron or Kubernetes CronJobs. I define scheduled jobs in config/sidekiq_scheduler.yml with standard cron syntax and optional parameters. Jobs run on only one Sidekiq instance even in multi-process deployments thanks to Redis-based locking. I use scheduled jobs for daily aggregations, weekly email digests, or hourly cleanup of expired records. The key is keeping scheduled jobs idempotent since timing isn't guaranteed to be exact. For critical time-sensitive jobs, I add monitoring to alert when a scheduled job hasn't run recently.

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