Ok, So I did that, in the windows capture file are many many lines of Red text on a black background, I assume thats a bad thing. It's every second or third line vs just a handful on the linux capture. Most of these lines are like: postgresql [ACK] Seq=5429 Ack=##### Win=65700 Len=0 Where the ACK number is always different. As I said before I really don't know what I am looking at. On Sun, Nov 7, 2010 at 1:19 PM, John R Pierce <pierce@xxxxxxxxxxxx> wrote: > On 11/06/10 5:12 PM, Rob Brown-Bayliss wrote: >> >> On Sun, Nov 7, 2010 at 1:06 PM, John R Pierce<pierce@xxxxxxxxxxxx> wrote: >>> >>> I think I'd run a packet sniffer like Wireshark on both client platforms, >>> sniffing 5432/tcp and see if there's something unusual in the timing of >>> the >>> packets, incorrect MTU or something, lost packets and extra retries, or >>> whatever. Perhaps Windows isn't using a sufficiently large TCP Recieve >>> Window (RWIN) value, or something. >> >> I am a bit out of my depth there, but for all other network use the >> machine seems the same in either os. That is no noticiable difference >> in download/upload speed. > > download/uploads from/to this same server in Canada ? > > Wireshark is pretty easy to use. tell it you only want to capture TCP > traffic on port 5432 (to or from 5432), then start its capture and run your > query. it shows the network packets with a ton of info including a > millisecond accurate timestamp on each packet. do this on each OS and > compare the timings on these captures (you can save the capture from one > system and load it on wireshark on the other OS so you can do side by side > compares) > > studying the details of a TCP connection via Wireshark should lead to a good > deal of understanding of the underpinnings of TCP/IP networking. > > > > > > -- > Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general > -- -- Rob -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
