89c0777d_HiveMQ_1_4_1___User_Guide_Table_3__Static_properties_Description
[Property Name] statistics.updateInterval [Default Value] 30 [Description] 
Interval in seconds for updating statistics internally. Too low intervals could result in performance loss. It is recommended, that the statistics_update_interval is smaller than the sys_interval and the statistics_callback_interval
HiveMQ 1.4.1 - User Guide
Description