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The uWSGI Stats Server

In addition to :doc:`SNMP<SNMP>`, uWSGI also supports a Stats Server mechanism which exports the uWSGI state as a JSON object to a socket.

Simply use the stats option followed by a valid socket address. If you want the stats served over HTTP you will need to also add the stats-http option.

--stats 127.0.0.1:1717
--stats /tmp/statsock
--stats :5050
--stats @foobar
# Any of the above socket types can also return stats using HTTP
--stats 127.0.0.1:1717 --stats-http

If a client connects to the specified socket it will get a JSON object containing uWSGI internal statistics before the connection ends.

uwsgi --socket :3031 --stats :1717 --module welcome --master --processes 8

then

nc 127.0.0.1 1717
# or for convenience...
uwsgi --connect-and-read 127.0.0.1:1717

will return something like this:

{
  "workers": [{
    "id": 1,
    "pid": 31759,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 2,
    "pid": 31760,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 3,
    "pid": 31761,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 4,
    "pid": 31762,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 5,
    "pid": 31763,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 6,
    "pid": 31764,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 7,
    "pid": 31765,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }, {
    "id": 8,
    "pid": 31766,
    "requests": 0,
    "exceptions": 0,
    "status": "idle",
    "rss": 0,
    "vsz": 0,
    "running_time": 0,
    "last_spawn": 1317235041,
    "respawn_count": 1,
    "tx": 0,
    "avg_rt": 0,
    "apps": [{
      "id": 0,
      "modifier1": 0,
      "mountpoint": "",
      "requests": 0,
      "exceptions": 0,
      "chdir": ""
    }]
  }]
}

uwsgitop

uwsgitop is a top-like command that uses the stats server. It is available on PyPI, so use easy_install or pip to install it (package name uwsgitop, naturally).

The sources are available on Github. https://github.com/unbit/uwsgitop