Niklas Laxström wrote:
When using CDB, the cache is constant. You can't do incremental updates. And what if WMF uses *single* cache for all projects? Then {{SITENAME}} wouldn't be constant anymore, and we would not get better performance where it is needed most. It could help other MediaWiki installations a bit, just how much... I don't know.
How could it use a single cache for all projects? Each project has its own messages...