User blog comment:Rappy 4187/Technical Update: July 20, 2016/@comment-26154973-20160721213248

Was Lua engine switched from LuaSandbox to default one (LuaStandalone) recently? The NewPP format changed accordingly ~1-2 days ago (scribunto-limitreport-virtmemusage instead of scribunto-limitreport-memusage), and there are problems with memory usage on http://kancolle.wikia.com/ (10+ times more memory required, which is killing many pages, because they were developed under different constraints).