Forum OpenACS Q&A: Is PermissionCacheP robust?
So before I start digging into the PermissionCacheP code myself, what was the conclusion of that discussion? Is PermissionCacheP now robust and a good thing, or are there still problems or concerns?
Properly maintaining the cache in that circumstance is very expensive and consequently no attempt is made to do it.
So the short answer is that if you have permissions set up in a particular way on your site it *might* work but but generally there are a lot of cases where the cache is out of sync with the DB. With Don's permissions checking speedup work it is hopefully not necessary for most sites anyway.