Re: strange performance problem

>
> I have been testing with tcpdump but i dont see the problem in the
> traffic (aside from the fact that it gives big jumps in ms between
> packets of data, but i dont know why), i have tested on other debian
> machines with the same result, i have upgraded kernel to 2.6.28 and
> postgresql to 8.3.6 (equal versions of my Arch Linux Development
> machine), but still have the same problem:
>
> -query with \timing with "psql -d database" ~110ms
> -query with \timing with "psql -d database -h localhost" ~4400ms
>
> Using tcp the cpu of postgresql spike to the max it can borrow within
> the query. I have attached the tcpdump logs of a debian machine and the
> Arch too (maybe anyone can see anything in them that i can not). How i
> can test pure speed in the loopback interface? i have tried iperf but
> seems to be cpu bound so maybe the results are misleading.
>

The pcap files are here for download, the mail with the attachment seems to not
get into the list so here it is a link to download them.
http://www.linos.es/pcap_files.tar.bz2

Regards,
Miguel Angel.