What would happen when facebook reaches maximum autoincrement value -

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i wondering. happen facebook database store messages when autoincrement column (bigint) reaches maximum value?

it fall over. it's not happen time given how big bigint (nine quintillion 2 hundred twenty 3 quadrillion 3 hundred seventy 2 trillion thirty 6 billion).

thats presuming use sort of system store messages, if used nosql system wouldn't happen.


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