2011/11/8 Xi Chen <[email protected]>: > > > On 8 November 2011 08:31, Evgeny Turnaev <[email protected]> wrote: >> >> 2011/11/7 Xi Chen <[email protected]>: >> > I have checked my uwsgi process strace again, and found too many this: >> > send(19, "POST /v1/alternative.cgi HTTP/1.1"..., 198, 0) = 198 >> > poll([{fd=19, events=POLLOUT}], 1, 1000) = 1 ([{fd=19, >> > revents=POLLOUT}]) >> > send(19, "{\"visitor\": \"82d6d2b773b9eab8bdd7"..., 123, 0) = 123 >> > poll([{fd=19, events=POLLIN}], 1, 1000) = 1 ([{fd=19, revents=POLLIN}]) >> > recv(19, "H"..., 1, 0) = 1 >> > poll([{fd=19, events=POLLIN}], 1, 1000) = 1 ([{fd=19, revents=POLLIN}]) >> > recv(19, "T"..., 1, 0) = 1 >> > poll([{fd=19, events=POLLIN}], 1, 1000) = 1 ([{fd=19, revents=POLLIN}]) >> > recv(19, "T"..., 1, 0) = 1 >> > poll([{fd=19, events=POLLIN}], 1, 1000) = 1 ([{fd=19, revents=POLLIN}]) >> > recv(19, "P"..., 1, 0) = 1 >> > >> > Looks like instead of recieve entire http header, but receive only one >> > byte >> > at a time. Because I call many other external webservices, this could >> > cause >> > tons of recv syscalls. >> > Really no clue why it only recv 1 byte. I have checked sysctl and seems >> > pretty fine. >> > Any ideas? >> >> I heard python urllib reads http headers by 1 byte. That will be a lot >> of recv(1) >> if one have a lot of connections. Don`t know if this fixed/not fixed >> but searching in google confirms rumors. >> Althrough i can`t find recv(1) in python urllib. You can confirm this >> doing just urllib fetching without uwsgi and stracing. >> > > I have just tried on my ubuntu desktop using urllib, urllib2. HTTP headers > can be recv'd: > recv(3, "HTTP/1.1 200 OK\r\nContent-Type: a"..., 8192, 0) = 277 > But the same code (same python ver also) I move to Debian lenny production > server, it becomes > recv(19, "H"..., 1, 0) = 1 > recv(19, "T"..., 1, 0) = 1 > recv(19, "T"..., 1, 0) = 1 > It seems only occur when I make a POST request to external webservice, and > only http header cannot be read entirely. Really frustrating.
Hmm.. pretty strange. Are you sure python version matches including minor subversion? If it works in ubuntu maybe it is fixed in latest python - you can compile latest python from source and test it. > uWSGI mailing list > [email protected] > http://lists.unbit.it/cgi-bin/mailman/listinfo/uwsgi > > -- -------------------------------------------- Турнаев Евгений Викторович +7 906 875 09 43 -------------------------------------------- _______________________________________________ uWSGI mailing list [email protected] http://lists.unbit.it/cgi-bin/mailman/listinfo/uwsgi
