Over the years I have used beanstalkd for all things queue. Working flawlessly every single time.

This is an output for our oldest instance (legacy system running Ubuntu 12)

  Trying 127.0.0.1...
  Connected to localhost.
  Escape character is '^]'.
  stats
  OK 952
  ---
  current-jobs-urgent: 0
  current-jobs-ready: 765
  current-jobs-reserved: 2
  current-jobs-delayed: 946
  current-jobs-buried: 0
  cmd-put: 1188640739
  cmd-peek: 2718986
  cmd-peek-ready: 5052
  cmd-peek-delayed: 797
  cmd-peek-buried: 797
  cmd-reserve: 0
  cmd-reserve-with-timeout: 3245006799
  cmd-delete: 1188639093
  cmd-release: 43276760
  cmd-use: 1137988211
  cmd-watch: 166122
  cmd-ignore: 166077
  cmd-bury: 0
  cmd-kick: 1
  cmd-touch: 0
  cmd-stats: 1260
  cmd-stats-job: 43134828
  cmd-stats-tube: 53942209
  cmd-list-tubes: 3251625
  cmd-list-tube-used: 0
  cmd-list-tubes-watched: 0
  cmd-pause-tube: 988
  job-timeouts: 14084
  total-jobs: 1188640739
  max-job-size: 1048576
  current-tubes: 44
  current-connections: 63
  current-producers: 20
  current-workers: 47
  current-waiting: 41
  total-connections: 14996583
  pid: 3959
  version: 1.4.6
  rusage-utime: 170303.331293
  rusage-stime: 399435.543161
  uptime: 321658179
  binlog-oldest-index: 90539
  binlog-current-index: 90983
  binlog-max-size: 10485760