Tim Starling wrote:
In 1.2, only the internal messages from the MediaWiki
namespace were cached.
In 1.3, custom messages are moved to the Template namespace and the whole
namespace is cached. [...] The first
web request after that should then cache the namespace successfully.
Why exactly are you trying to cache the entire namespace on a single Web
request? Shouldn't you cache only those that the Web request actually
requested? In other words, it should not have tried to cache all the
templates in the MediaWiki namespace, but only those that were actually
used by the Web requests. I would have thought this is the purpose of a
cache: to store that which is commonly or recently accessed.