SQL queries on the French database this morning, causing the site to slow to a crawl for a while. They seem to be finished now, and no harm done, but I'd like to suggest that if there are some particular statistics you're looking for and you suspect that a particular query might be expensive, ask about it on one of the mailing lists. We might be able to help optimize it, or get the statistics another way, or even ust suggest a better time to run.
wikipedia-l@lists.wikimedia.org