wp mirror, 04/07/2014 23:33:
2.1) Speed: Importation proceeds at less than 0.1
pages/sec. This means
that, for the largest wikis (commonswiki, enwiki, wikidatawiki)
importation cannot be completed before the `xincr' for the next day is
posted.
Did you try
https://meta.wikimedia.org/wiki/Data_dumps/ImportDump.php ?
https://www.mediawiki.org/wiki/Manual:Performance_tuning is also
important, for instance in the last import I tried most time could be
saved by setting proper l10n cache (on CDB).
Nemo