[wp-trac] [WordPress Trac] #15543: _get_last_post_time() uses the incorrect cache key

[WordPress Trac]

#15543: _get_last_post_time() uses the incorrect cache key
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 Reporter:  mdawaffe      |       Owner:  scribu  
     Type:  defect (bug)  |      Status:  accepted
 Priority:  high          |   Milestone:  3.1     
Component:  Cache         |     Version:          
 Severity:  major         |    Keywords:          
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Comment(by mdawaffe):

 Replying to [comment:2 scribu]:
 > Is there a way to invalidate the entire 'timeinfo' group?
 No.  Memcache (and most wp_cache implementations) cannot do this.

 There's a way around this, but it's tricky.  You keep track of an
 incrementor, $i, in the cache and then do cache operations on the group
 "timeinfo-$i".  To "invalidate" the group, you increment $i using
 wp_cache_incr().

 Replying to [comment:3 scribu]:
 > A compromise would be to use a single cache key for all post types. That
 will still probably take care of the original problem.
 That would work.

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Ticket URL: <http://core.trac.wordpress.org/ticket/15543#comment:6>
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