Question : How can I improve the RHEL TCP performance

What is the meaning on the following netstat.  It was gathered using netstat -st after conducting a performance testing.  What does it mean and any recommendations in terms of TCP settings:

Tcp:
    3027 active connections openings
    15812 passive connection openings
    124 failed connection attempts
    0 connection resets received
    4146 connections established
    60824848 segments received
    59158934 segments send out
    162288 segments retransmited
    0 bad segments received.
    287 resets sent
TcpExt:
    1124 TCP sockets finished time wait in fast timer
    714963 delayed acks sent
    3246 delayed acks further delayed because of locked socket
    Quick ack mode was activated 4545 times
    256 times the listen queue of a socket overflowed
    256 SYNs to LISTEN sockets ignored
    52793299 packets directly queued to recvmsg prequeue.
    5788359 packets directly received from backlog
    128457587 packets directly received from prequeue
    22530092 packets header predicted
    11474 packets header predicted and directly queued to user
    1238816 acknowledgments not containing data received
    24272631 predicted acknowledgments
    47456 times recovered from packet loss due to SACK data
    Detected reordering 11 times using FACK
    TCPDSACKUndo: 36
    802 congestion windows recovered after partial ack
    52381 TCP data loss events
    8355 timeouts after SACK recovery
    1557 timeouts in loss state
    84051 fast retransmits
    12872 forward retransmits
    29416 retransmits in slow start
    18706 other TCP timeouts
    5590 sack retransmits failed
    1 times receiver scheduled too late for direct processing
    4555 DSACKs sent for old packets
    2872 DSACKs received
    49 DSACKs for out of order packets receive

Answer : How can I improve the RHEL TCP performance

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