Log sums from profiling into "profiling" table in db.
In MediaWiki 1.22 and older, in order to use this, you have to create the 'profiling' table in your database.
maintenance/archives/patch-profiling.sql を参照してください。
In newer versions, $wgProfileToDatabase was removed.
Configure $wgProfiler with output type "db" instead of using $wgProfileToDatabase.