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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
open the word document,
double click on top of your page or go to enable header & footer
click of the button Align Right Side/Align Left Side (Which ever side you want to select) on tool bar,
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