This metric shows the number of TCP connections that are closed successfully. A connection is successfully closed if both the user and server request the connection be closed and the other side acknowledges the close request. A connection is considered successfully closed if these events occur:
If during the connection closing process, one side or the other sends a connection RESET, then the would be incremented instead.
This metric shows the number of TCP connections that were active during the time interval. A connection is considered active if it transmits any packets during the time interval. A newly opening connection counts as active. Connections that were already open when the time interval started are not considered active until they transmit at least one packet, even if it is a packet to reset (for example, halt) the connection.
As an example, consider a connection that is open and transmitting data between 8:00-8:05. That connection is included in the connection count for that interval. The same connection then does not transmit any data between 8:05-8:10, and is excluded from the connection count for the 8:05-8:10 interval. Finally, during the 8:10-8:15 interval the same connection transmits more data and is then included in the connection count for that interval.
This metric shows the amount of time TCP connections remain open. The connection duration is the difference between when the connection started (first packet in connection) and when the connection was last active (last packet in connection).
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