lib/metrics.js
function Gauge(key, tags, host) {
    Metric.call(this, key, tags, host);
    this.value = 0;
}
function Gauge(key, tags, host) {
    Metric.call(this, key, tags, host);
    this.value = 0;
}
function Gauge ( key , tags , host ) { Metric . call ( this , key , tags , host ) ; this . value = 0 ; }
GAUGE ----- Record the current *value* of a metric. They most recent value in a given flush interval will be recorded. Optionally, specify a set of tags to associate with the metric. This should be used for sum values such as total hard disk space, process uptime, total number of active users, or number of rows in a database table.
GAUGE ----- Record the current * value * of a metric . They most recent value in a given flush interval will be recorded . Optionally specify a set of tags to associate with the metric . This should be used for sum values such as total hard disk space process uptime total number of active users or number of rows in a database table .