The Connected Sessions chart shows SQL Server session information.
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The Connected Sessions chart contains an area graph showing the number of SQL Server sessions over time. If you have a non-zero User Connections parameter set on the server being monitored, the Y-axis is scaled to the value you specified, which allows you to see how close you are to this limit. Sessions are categorized as:

  • Internal SQL Server System sessions
  • Active user sessions
  • Idle user sessions

A Session is a single connection to SQL Server. Some applications establish multiple sessions to SQL Server. If there are multiple applications running on a target computer that are all communicating with SQL Server, they will also have created multiple SQL Server sessions.