Re: [support] When are Caches Cleared?

Fred Jones wrote:

Question is when does it expire? I see there is a minimum and mine is set to NONE. I *think* what I am asking is about the maximum.

That would depend on the "cache_flush_$table" variable and the cache_lifetime variable and whether or not the cache is deemed CACHE_PERMANENT (a.k.a. expire == 0). See http://api.drupal.org/api/function/cache_get/6 for more information. CACHE_PERMANENT should only be used for things like variables data and the theme_registry. 'cache_lifetime' is the variable for the minimum.

Tracing through it, maybe there is a bug but I don't know it to be. I am sure that if "cache_flush_$table" isn't set that the cache will never be deleted unless cache_clear_all is called with a "wildcard".