statsd

statsd is a network daemon for aggregating statistics, such as counters and timers, and shipping over UDP to backend services, such as Graphite or Datadog.

The most basic coverage of this plugin is that the namespace, sender, and metric names are combined into the full metric path like so:

`namespace.sender.metric`

The general idea is that you send statsd count or latency data and every few seconds it will emit the aggregated values to the backend. Example aggregates are average, max, stddev, etc.

You can learn about statsd here:

A simple example usage of this is to count HTTP hits by response code; to learn more about that, check out the ../tutorials/metrics-from-logs[log metrics tutorial]

The default final metric sent to statsd would look like this:

`namespace.sender.metric`

With regards to this plugin, the default namespace is "logstash", the default sender is the ${host} field, and the metric name depends on what is set as the metric name in the increment, decrement, timing, count, `set or gauge variable.

Example:

output {
 statsd {
  host => "statsd.example.org"
  count => {
   "http.bytes" => "%{bytes}"
  }
 }
}

statsd {
}