Yahoo Claims Record With PostgreSQL Petabyte Database

"Yahoo's data needs are substantial. According to Hasan, the travel industry's Sabre system handles 50 million events per day, credit card company Visa handles 120 million events a day, and the New York Stock Exchange has handled over 225 million events in a day. Yahoo, he said, handles 24 billion events a day, fully two orders of magnitude more than other non-Internet companies."