MySQL - Is there a theoretical limit?
Interesting question about MySQL scalability:
Guy: Is there a theoretical limit of MySQL in case a small business uses it and sales/transactions/whatever explode?I am a fan of MySQL myself.
Marten: Every software product has its limits, but I think we have shown that MySQL can scale enormously. Google runs its entire ad system on MySQL. Nokia runs mobile phone networks on MySQL. Booking.com runs all their business transactions on MySQL. If a small business reaches those limits, it is not a small business any longer--it is an enormous global player.
Good to know that FaceBook also uses MySQL (with it's 65 million users), and YouTube used MySQL and Twitter uses MySQL (Scaling Twitter: Making Twitter 10000 Percent Faster).