Hi Valentin,

Thanks for your response. We've asked the other company if they might try something other than ab for their testing, but so far they seem to want to keep using it. As a result, we're stuck with supporting it.

From the testing that the other company has done, and from the testing that we've done to try to repeat their results, it does not appear that nginx is supporting keepalives on HTTP/1.0 requests. We see the request header go out with keepalives requested, but the response header contains Connection: Close.

If nginx supports this by default, it implies that we have an incompatible config option. keepalive_timeout is 600 for this virtual server (tried it at 30s, also - same result). We aren't using any other keepalive configs.

Any suggestions as to where else we might look?

Cheers,

Dean