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

[David Anderson]

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

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