Related, but slightly different:
What is the best way for an extension (MW 1.9.x+) to invalidate cached
versions of a *different* page than the one currently being rendered?
In my case, my wiki's Main_Page contains an extension tag that sometimes
needs to be re-rendered when source data changes. Because it's the
Main_Page, I'd rather not disable caching altogether, but instead,
invalidate the cached version when I know it's outdated.
Thanks,
/Maarten.