[wp-trac] [WordPress Trac] #63070: Flushing object cache removes all transients

[WordPress Trac]

#63070: Flushing object cache removes all transients
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 Reporter:  deploysk     |       Owner:  (none)
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  Awaiting Review
Component:  General      |     Version:
 Severity:  normal       |  Resolution:
 Keywords:  close        |     Focuses:  performance
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Changes (by flixos90):

 * keywords:   => close


Comment:

 @deploysk Thank you for reporting this, and welcome to Trac.

 After considering the ticket, I am not sure it makes sense for WordPress
 Core, for the following reasons:
 * Transients are caches, just like other data in object cache. From that
 perspective, I don't see why flushing the cache shouldn't flush transients
 too.
 * The benefit of transients is that they also work on sites without an
 object cache.
 * A `wp_cache_flush()` call by its name implies that caches are cleared.
 So it does not sound right to me to leave transients in place when this
 function is called.
 * Even if we wanted to implement it, technical limitations may make it
 tricky or even impossible. It would require a mechanism that deletes all
 object cache groups except the transient groups. The alternative would be
 to store transients in the database ''always'', but that is a no-go for
 big sites where the database for transients could lead to performance
 issues.

 Would like to hear other people's feedback, but I'm leaning towards
 closing.

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Ticket URL: <https://core.trac.wordpress.org/ticket/63070#comment:1>
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