shell> curl --dump - http://localhost:8529/_api/tasks/statistics-average-collector
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"id" : "statistics-average-collector",
"name" : "statistics-average-collector",
"created" : 1484129188.886072,
"type" : "periodic",
"period" : 900,
"offset" : 20,
"command" : "(function (params) { require('@arangodb/statistics').historianAverage(); } )(params);",
"database" : "_system",
"error" : false,
"code" : 200
}