[wp-hackers] Transients that are not re-used after their expiry are never garbage-collected

Otto otto at ottodestruct.com
Fri May 3 13:34:39 UTC 2013

Why would you have a transient with a unique key? Or a key that
changes? This sort of defeats the point of using a transient in the
first place.

Sounds to me like you should fix the code that is using transients incorrectly.


On Fri, May 3, 2013 at 4:18 AM, David Anderson <david at wordshell.net> wrote:
> Hi,
> Just a heads-up for others who may not be aware of this - I was not until
> today, until I began to look at my options table with ~250,000 entries in it
> (after 2 months!)...
> WordPress does not garbage-collect transients unless you attempt to access
> them. This means that if you use transients with unique keys, or keys that
> are not expected to be used after a certain time (e.g. as access tokens),
> then they may never be purged.
> Here's a simple plugin to provide temporary relief until this is fixed in
> core:
> http://downloads.wordpress.org/plugin/artiss-transient-cleaner.1.1.zip
> Trac ticket for the issue:
> http://core.trac.wordpress.org/ticket/20316#comment:16
> Best wishes,
> David
> --
> WordShell - WordPress fast from the CLI - www.wordshell.net
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