89c0777d_HiveMQ_1_4_1___User_Guide_Table_3__Static_properties_Description
[Property Name] graphite.metricPrefix [Description] 
A prefix for every metric which is sent to the Graphite instance. Useful for distinguishing between different HiveMQ servers or when using a hosted Graphite service to prefix the API Key
HiveMQ 1.4.1 - User Guide
Description