I know that a large number of key pairs in wallet.dat is not a concern. But is having too many transactions in wallet.dat an issue?
Can Bitcoin Core start crashing after it reaches a certain number of transactions? Say over 100K?
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Check out my answer on a similar question for a previous bitcoin core version: bitcoin.stackexchange.com/questions/24947/…– user11221Commented Aug 28, 2014 at 12:11
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"how it would affect the wallet if there were transactions linked to each of the 75 million receiving addresses" that is the core of our question.– Rıfat Erdem SahinCommented Aug 28, 2014 at 13:14
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Well there is currently a total of ~45,000,000 txs in the blockchain so this is definitely something we can examine on a theoretical basis only.– user11221Commented Aug 28, 2014 at 14:52
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1 Answer
Large wallets take significantly longer to initialize and eventually bog down the client to the point of making it completely unusable (calls that attempt to sort usable outputs to spend for example get slower). Bitcoin Core's wallet really isn't designed for commercial scale use, but many people have found it usable with half gigabyte wallets (hundreds of thousands of addresses and transactions) or more in this sort of setting.
Once you get beyond the scaling of Bitcoin Core the only other realistic option is moving into a completely custom wallet system, though this has significant risk and cost involved.
