Sorry I was subscribed via the digest so this ended up being a new thread ( i have subscribed for each message ).

Are you able to reproduce the problem without any 3rd party modules? Since nginx itself does not use pipes, this looks like a pagespeed problem.
Not really we use about 500mb/s of bandwidth with pagespeed turned on and we are using about 2 gigabits a second with it turned off ( although I think that is more hitting the limits of the interconnect ).
I could try a different release. A two minute look at the nginx source shows pipes around upstream I think. Is there a method of working out where an nginx process is stuck ( It does not respond to the normal signals )._______________________________________________
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