yongchao.xu@newtouch.cn writes:
> I have this problem today: one thread of our application hung, and
> we found the thread waiting for the result of poll() function. poll()
> was called by pgSocketCheck(). So is it a bug of pg?
So far as anyone can tell, this trace just indicates that the
application is waiting for a response from the server. If there's
a bug there, you'd need to provide more or different information to
prove it. I think more likely you need to be consulting
http://wiki.postgresql.org/wiki/Slow_Query_Questions
regards, tom lane