If I Cache to Database, then What's Purpose of Cache Directory?
Topic on Project:Support desk
There are lots of caches used for lots of purposes. There are only two currently that mostly use disk. Localization cache, which uses Manual:$wgCacheDirectory and Manual:File cache which can use Manual:$wgFileCacheDirectory.
Thx! What cache is Extension: CategoryTree likely to use? Purging pages seems to have no effect on it.
Category structure is stored in database. See Manual:Categorylinks table. If the information in database is incorrect, the problem is not with caching, but with probably Manual:Job queue or some extension causing jobs inserting to database to fail.
It seems my CategoryTrees are showing both the old version and new version of moved pages, and there are no unfinished jobs. Maybe not a caching issue.