[ckan-dev] Caching - package pages (development copy)

Thu Dec 2 16:01:24 UTC 2010

Thanks William,

Richard

On Thu, Dec 2, 2010 at 3:57 PM, William Waites <ww at eris.okfn.org> wrote:
> * [2010-12-02 14:44:02 +0000] Richard Pope <richard at memespring.co.uk> écrit:
>
> ] I'm hitting a caching problem on the package page. All my settings are
> ] set to zero:
>
> So this is becoming a FAQ - the answer is in the list archives, but
> I'll repeat.
>
> ]
> ] # CKAN search cache
> ] # any non-empty value enables it
> ] enable_caching =
>
> What you want is
>
>     cache_enabled = no
>
> this is the configuration setting that is used by beaker and the
> beaker-derived ckan.lib.cache. The "enable_caching" setting is a
> historical ckan thing that has something to do with template caching.
> enable_caching should be deprecated and merged with cache_enabled (and
> also be made to work with asbool() instead of this "set to any value
> even if a confusing one like no or false to enable" business.
>
> ] # cache to persistent files
> ] beaker.cache.type = file
> ] # cache expiry settings for specific controllers
> ] # by default these are disabled, enable as needed to a time in seconds
> ] ckan.controllers.home.expires = 0
>
> this value means that etags (based on the last modified time) are used
> instead of telling upstream caches (i.e. squid or your web browser) to
> cache pages for a certain time. the pages will still get cached
> internally unless they have been modified. If you suspect an actual
> bug, sprinkle some printfs in ckan.lib.cache and
> controller.package.last_modified
>
> ] ... but the pages are still being cached so changes I make are not
> ] visible.  Any suggestions? def etag_cache(cache_key) on approx. line
> ] 108 is as far as the code runs.
>
> changes you make should be sufficient to trigger an update to the
> last_modified value which should cause the internal (beaker) cache to
> be refreshed.
>
> HTH,
> -w
> --
> William Waites
> http://eris.okfn.org/ww/foaf#i
> 9C7E F636 52F6 1004 E40A  E565 98E3 BBF3 8320 7664
>

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