Average First Byte Time

This metric measures the average First Byte Time for all pages in the transaction. This metric is computed as: Total First Byte Time / Number of Requests Made (either to fetch HTML or content). The First Byte time is one of the phases of a transaction that can help you isolate and fix response time problems.

User Action

The average First Byte Time, when reviewed over a period of time, can indicate whether network congestion or other connectivity issues are the cause of poor Web application response time.