[wp-trac] [WordPress Trac] #14759: Improve the way oEmbed deals with caching

[WordPress Trac]

#14759: Improve the way oEmbed deals with caching
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 Reporter:  Viper007Bond  |       Owner:
     Type:  enhancement   |      Status:  new
 Priority:  normal        |   Milestone:  Future Release
Component:  Embeds        |     Version:  3.0.1
 Severity:  normal        |  Resolution:
 Keywords:                |
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Comment (by Viper007Bond):

 Transients unfortunately probably aren't a viable solution. The problem is
 that if you have a persistent object cache enabled, transients are never
 written to the database, only to memcached or whatever system you have set
 up. These caches come and go and will almost certainly not last 30 days
 (likely much, much less). This would result in more frequent cache
 fetching. This is why I chose post meta in the first place -- it is
 persistent.

 There's also the issue of race conditions. If a cache expires and your
 site is very popular, you will easily have hundreds of users triggering
 the cache repopulation before it is completed. This is why caching is dome
 preemptively right now via an AJAX request (after you come back to the
 edit page after saving).

 Asynchronous cache repopulation is probably the solution here, i.e. WP-
 Cron. It could loop through the post meta entries and regenerate any that
 have expired.

 Post meta isn't a great solution but it's the best one I've come up with.
 :/

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Ticket URL: <http://core.trac.wordpress.org/ticket/14759#comment:18>
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