Facebook shares some secrets on making MySQL scale

“Kicking off the event, Facebook’s Domas Mituzas shared some
stats that illustrate the importance of its MySQL user
database:

MySQL handles pretty much every user interaction: likes, shares,
status updates, alerts, requests, etc.
Facebook has 800 million users; 500 million of them visit the site
daily.
350 million mobile users are constantly pushing and pulling status
updates
7 million applications and web sites are integrated into the
Facebook platform
User data sets are made even larger by taking into account both
scope and time

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