phubb, my own PubSubHubbub server, uses Gearman as job queue system. You may check the current status with gearadmin --status, but nobody tells you what the columns actually mean:
$ gearadmin --status phubb_notifysubscriber 1 1 1 phubb_verify 0 0 1 phubb_publish 0 0 1 .
Every registered task/job has its own line. Data in columns are separated with a tab character. The listing ends with a single dot on its own line.
- Column 0
- Job/task name
- Column 1
- Number of unfinished tasks
- Column 2
- Number of currently running tasks
- Column 3
- Number of workers that can handle that task
The screendump shows you that there is a worker available that can handle every task. Also, there is one phubb_notifysubscriber task open and that one is also being executed right now.