Since Web2py had its own scheduler, too many peoples asked for an embedded monitoring solution. ComfortScheduler it's just my way of defining it. It bakes a lot of features and relies on a RDBMS, which most of web apps have anyway in their stack.
Right now the plugin scans the scheduler's tables, and it's a first step towards a more "precise" analyzing solution. Please try it and report back your findings.

INSTRUCTIONS:

• download it and merge with your app's code

• no cache is used ATM, but I'm planning to use that to avoid db pressure. Change in controllers/plugin_cs_monitor.py the lines

  sc_cache = cache.ram
  GROUPING_MODE = 'database' # or 'python'
  ANALYZE_CACHE_TIME = 60
  TASKS_SUMMARY_CACHE_TIME = 10

  to match your preferences

  sc_cache = cache.ram #your cache backend
  GROUPING_MODE = 'database' # or 'python', to save the db from some heavy queries
  ANALYZE_CACHE_TIME = 60 #how many seconds cache the queries done to analyze the task
  TASKS_SUMMARY_CACHE_TIME = 10 #how many seconds cache the queries for the task summary on the index page

• the index() function is just a placeholder, every URL is generated with user_signature, so change the permission according to your requirements only in the index() function.

  @auth.requires_login()
  def index():
      return dict()

  e.g to

  @auth.requires_membership('superadministrators')
  def index():
      return dict()

TODO:

• Groupings can be done in python too, to avoid db pressure
• analyze_task works scanning scheduler_run results. It should detect automatically if no runs are there and switch groupings.
• add REST interface ?