Strange different behavior

John Norman john at
Fri Jan 15 15:46:59 CET 2010


But if your application backend really doesn't do anything different
for different user agents, then one should probably remove the

On Fri, Jan 15, 2010 at 7:52 AM, Poul-Henning Kamp <phk at> wrote:
> In message <b6b8b6b71001150449v40d1b9c3s5b86dbd27cc593ee at>, John
> Norman writes:
>>Sorry to be so obtuse:
>>So with the default setup, there will be a cached copy of a page for
>>every single user agent?
> Yes, unless you do something about the "Vary: User-Agent" header
> returned from the backend.
>>If so, does anyone have a good number of user agents that should be
>>supported for calculating the size of the cache? E.g., if I've guessed
>>64M for my pages, and I imagine that there are 10 user agents (I know
>>it's more) then I'd want to multiply that 64M x 10.
> You really need to find out what bit of user-agent your backend
> cares about.  We are talking a multiplication factor of 100-1000 here.
> Poul-Henning
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
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