Statsd
statsd
is a metrics aggregation server. We use it to aggregate metrics for
Graphite
. It flushes data points to Graphite at an interval of 60 seconds (the highest resolution supported by our Graphite configuration), otherwise only the last data point in a given minute would be stored. Statsd also adds various properties to the data such as
.rate
,
.median
,
.p95
, etc. More about that at
Graphite#Extended properties
.
Service
Wikimedia currently uses the
statsite
implementation (
package
,
website
), written is a
C program
that is wire-compatible with Etsy's original Statsd (written in Node.js).
Several statsite deamons are hosted on the main
Graphite
servers, with a local load-balancer in front of them (
statsd-proxy
). You should access it through the canonical hostname "
statsd.eqiad.wmnet
".
History
Use of Statsd was first deployed in 2015 using wikimedia/statsdlb , a StatsD-compatible load-balancer written in C by Ori Livneh. This ran in front of armon/statsite , a C implementation of statsd.
In 2016, the wikimedia/statsdlb service was replaced by hit9/statsd-proxy for performance reasons ( T126447 ).
See also
- Graphite
- statsite documentation
- etsy/statsd documentation (more elaborate)
- Metric types