采用netstat -s查看了下本站近日来的网络流量：
Ip:
3536443 total packets received
0 forwarded
0 incoming packets discarded
3536443 incoming packets delivered
1535307 requests sent out
Icmp:
4683 ICMP messages received
1 input ICMP message failed.
ICMP input histogram:
destination unreachable: 11
echo requests: 4672
5214 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 542
echo replies: 4672
Tcp:
588 active connections openings
12384 passive connection openings
0 failed connection attempts
2877 connection resets received
1 connections established
3410825 segments received
1523678 segments send out
14458 segments retransmited
8 bad segments received.
1664 resets sent
Udp:
7866 packets received
542 packets to unknown port received.
0 packet receive errors
7867 packets sent
TcpExt:
35 resets received for embryonic SYN_RECV sockets
2 packets pruned from receive queue because of socket buffer overrun
5 ICMP packets dropped because they were out-of-window
3028 TCP sockets finished time wait in fast timer
250 packets rejects in established connections because of timestamp
24109 delayed acks sent
2 delayed acks further delayed because of locked socket
Quick ack mode was activated 563 times
5903 packets directly queued to recvmsg prequeue.
30 of bytes directly received from prequeue
2783473 packet headers predicted
177804 acknowledgments not containing data received
255711 predicted acknowledgments
831 times recovered from packet loss due to fast retransmit
5564 times recovered from packet loss due to SACK data
Detected reordering 38 times using reno fast retransmit
109 congestion windows recovered after partial ack
2061 TCP data loss events
70 timeouts after reno fast retransmit
453 timeouts after SACK recovery
103 timeouts in loss state
9750 fast retransmits
331 forward retransmits
1252 retransmits in slow start
1096 other TCP timeouts
TCPRenoRecoveryFail: 161
368 sack retransmits failed
59 packets collapsed in receive queue due to low socket buffer
540 DSACKs sent for old packets
94 DSACKs received
26 connections reset due to unexpected data
68 connections reset due to early user close
79 connections aborted due to timeout
最为图形化显示可采用http://www.alexa.com/data/details/traffic_details?url=http://bioinfoserv.3322.org
Dr. Liu