tor 2010-09-30 klockan 13:24 +1000 skrev Paul Freeman: > However on further investigation, I don't think this is the case in this > instance. For some reason, the squid GET request to www.mhhe.com (IP > 12.26.55.139) takes a long time to be completed - approx. 2 minutes. Some > data is returned quickly but then there is a period where on my squid server > I see a TCP Previous Segment lost then squid server sending Dup ACKs to > www.mhhe.com and www.mhhe.com sending TCP Retransmissions for the same > segment. The Retransmission RTTs to ACK the one segment are at 0.2,4,8,16,32 > and 60 seconds. After that segment has finally been received, the rest of > the data is received OK. This smells like TCP window scaling issues in a firewall somewhere. Try as a test: echo 0 >/proc/sys/net/ipv4/tcp_window_scaling note that this is somewhat intrusive and reduces performance of TCP in general, but is an easy way of testing for the problem. Regards Henrik
