[wp-trac] [WordPress Trac] #37696: WP_Comment_Query loses sql_clauses with Object Cache

[WordPress Trac]

#37696: WP_Comment_Query loses sql_clauses with Object Cache
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 Reporter:  Rarst         |       Owner:  boonebgorges
     Type:  defect (bug)  |      Status:  reviewing
 Priority:  normal        |   Milestone:  4.6.1
Component:  Comments      |     Version:  4.6
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |     Focuses:
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Comment (by boonebgorges):

 Replying to [comment:16 Rarst]:
 > Fix for specific issue aside I would be very interested ''why'' it
 breaks on SiteGround specifically. Is it something they do with caching?
 Is it some caching edge case in core?
 >
 > As I mentioned I had caching issues before, but I as far as I can see
 their setup is pretty typical. Yet some issues come up there, but not
 elsewhere.

 It's possible that it's specific the Memcached config in use at SiteGroup.
 Memcached sorts data into buckets based on the size of the value being
 stored, which could result in different rules for invalidation, depending
 on how Memcached is set up. As @dd32 notes, our caching should be
 resilient against this kind of thing, so as far as I know SG is not doing
 anything wrong, but I agree it would be nice to have more details on why
 it's so easily reproducible there.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37696#comment:17>
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