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Type: APM as a Service

Old Article ID: 1003

Old Article Type: documentation



  • Dynatrace Portal
  • Synthetic Monitoring Mobile
  • Synthetic Monitoring Backbone
  • Synthetic Monitoring Last Mile
  • Synthetic Monitoring Private Last Mile




The First Byte Time is the time that elapses between these two actions:

  • HTTP request from the agent is received by the destination server that will provide the page's content.
  • The first packet for the content is received.

A high First Byte Time could be caused by a number of issues with the application's network, including:

  • Overloaded web servers
  • The load balancing scheme
  • Database connection issues