recorder waterfall char sms alerts support center emails april-2017 percentile threshold real user monitoring load testing 2017-Q2 news retry on error browser agent dcrum chart integration https web performance monitoring metrics leapsecond synthetic sliverlight private last mile 12.3 configuration summary apdex flash 2014-Q3-SEP native mobile app certificate dc rum interactive charting appmon setup tests mobile monitoring scoe waterfall chart scripting web services 12.4 timeout support guardian synthetic release number apr-2017 flex backbone benchmark private peer webinar dashboard last mile monitoring synthetic monitoring reports perspective report community awards custom action tests cloud web recorder ftp synthetic sla report reports custom code performance monitoring errors speed index data access data export dynatrace recorder notifications parameters synthetic monitoring windows recorder login visually complete third party w3c account high five award rest api synthetic mobile agent alerting wait dynatrace advanced synthetic portal