W3C home > Mailing lists > Public > ietf-http-wg@w3.org > April to June 2014

Re: Header Size? Was: Our Schedule

From: Wenbo Zhu <wenboz@google.com>
Date: Thu, 29 May 2014 10:41:13 -0700
Message-ID: <CAD3-0rO-gC0SHssBFjOLyeNyhr7zfK0z93pEgwPtihtT6xSaPQ@mail.gmail.com>
To: Greg Wilkins <gregw@intalio.com>
Cc: Amos Jeffries <squid3@treenet.co.nz>, HTTP Working Group <ietf-http-wg@w3.org>
On Thu, May 29, 2014 at 2:52 AM, Greg Wilkins <gregw@intalio.com> wrote:

>
> On 29 May 2014 06:52, Amos Jeffries <squid3@treenet.co.nz> wrote:
>
>> Personally I am in favour of 64K limit on headers
>
>
> That is an enormous increase in the resource commitment required by
> servers - per stream!. It is at least 8x the defacto standard an that is
> not counting compression.
>
> Roberto says that the same 16k  size limit has been applied to everything
> - which is not a bad idea.  So why exclude the poor servers from this?
> Server must hold onto the all the headers to make them available throughout
> the request processing, so allowing 64KB of compressed headers,  which
> could easily turn into close to much more than that, is a big commitment.
>
> The meta data channel required for transport of HTTP semantics is much
> smaller than that.  8KB does almost all cases - specially on the request
> side of things.
>
URLs may actually encode data for (GET) requests.  I think 16k is a
reasonable limit, but it's also an arbitrary limit (as most limits do).


> Sure future protocols are probably going to want more and more meta data -
> but why do we have to make the transport meta data channel available for
> such future protocols.  Let them open their own high priority stream, or
> send additional header sets within the data stream.   Let's not open the
> flood gates on the transport meta data channel, complete with the special
> exclusions from flow control and segmentation just to make it even more
> attractive to use!
>
> regards
>
>
>
>
>
>
>
>
>
> --
> Greg Wilkins <gregw@intalio.com>
> http://eclipse.org/jetty HTTP, SPDY, Websocket server and client that
> scales
> http://www.webtide.com  advice and support for jetty and cometd.
>
Received on Thursday, 29 May 2014 17:41:43 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 17:14:31 UTC