The TCP Object Type includes those counters that describe the rates that Transmission Control Protocol (TCP) segments are received and sent by a certain entity using the TCP protocol. In addition, it describes the number of TCP connections that are in each of the possible TCP connection states.
Table 17.4 TCP Performance Counters
TCP performance counter | Meaning |
Connection Failures | The number of times TCP connections have made a direct transition to the CLOSED state from the SYN-SENT state or the SYN-RCVD state, plus the number of times TCP connections have made a direct transition to the LISTEN state from the SYN-RCVD state. |
Connections Active | The number of times TCP connections have made a direct transition to the SYN-SENT state from the CLOSED state. |
Connections Established | The number of TCP connections for which the current state is either ESTABLISHED or CLOSE-WAIT. |
Connections Passive | The number of times TCP connections have made a direct transition to the SYN-RCVD state from the LISTEN state. |
Connections Reset | The number of times TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT state. |
Segments Received/Second | The rate at which segments are received, including those received in error. This count includes segments received on currently established connections. |
Segments Retransmitted/Second | The rate at which segments are retransmitted, that is, segments transmitted containing one or more previously transmitted bytes. |
Segments Sent/Second | The rate at which segments are sent, including those on current connections, but excluding those containing only retransmitted bytes. |
Segments/Second | The rate at which TCP segments are sent or received using the TCP protocol. |