On Mon, Sep 14, 2009 at 12:43:20PM -0700, David Birdsong wrote: > On Mon, Sep 14, 2009 at 12:38 PM, David Birdsong > <[email protected]> wrote: > > awesome, thanks. this explains poor cache-hit ratio. > > > > On Mon, Sep 14, 2009 at 12:22 PM, Kristian Lyngstol > > <[email protected]> wrote: > >> On Mon, Sep 14, 2009 at 11:57:25AM -0700, David Birdsong wrote: > >>> How is obj.ttl derived when both Expires and max-age is set by the > >>> backends? > >>> > >>> We had a case where the backend was setting Expires to 60seconds after > >>> the request and max-age was 5184000. Additionally in vcl_fetch: > >>> > >>> sub vcl_fetch { > >>> if (obj.ttl < 9000s) { > >>> set obj.ttl = 9000s; > >>> } > >>> } > >>> > >>> What would obj.ttl be set to given the Expires and max-age contradiction? > >> > >> If s-maxage is set, use that as default, otherwise use max-age as default. > >> > >> If Expires is sooner than the default, use that. > >> > >> So in your example, the ttl should be 60s. > oh, to clarify... > > would the stanza in vcl_fetch override the obj.ttl which was set by > the Expire header? > sub vcl_fetch { > if (obj.ttl < 9000s) { > set obj.ttl = 9000s; > } > } > > or do I have the order wrong?
Ah, yes, it would, I misread the < as >, sorry about that. But are you sure you're getting hits at all? -- Kristian Lyngstøl Redpill Linpro AS Tlf: +47 21544179 Mob: +47 99014497
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