SN-2715 已核对来源，附原文与上下文。
中本聪原话中本聪原帖 ↗现在的门槛是每区块 200KB，约合每区块 1000 笔交易。我认为应该降到每区块 50KB。那仍然是平均每区块交易量的 100 多倍。
The current threshold is 200KB per block, or about 1000 transactions per block. I think it should be lowered to 50KB per block. That would still be more than 100 times the average transactions per block.
我已在 SVN rev 157 里实现了这个改动。
I implemented this change in SVN rev 157.
我之前把门槛设得那么高，是为了让很大的交易也不必支付手续费。对于由一笔笔 50 BTC 挖矿奖励组成的交易，这个门槛大约相当于 26,000 BTC。尽管当时挖矿比现在容易 100 倍，也只有极少数人达到过这个手续费门槛。新门槛下，转出挖矿所得时大约到 11,000 BTC 才会触发手续费，而且主要只有挖矿所得才容易遇到这种情况。如果你的比特币是买来的，它们通常来自金额更大的交易，离手续费门槛还很远，除非你分几百笔交易买入。即使真的达到门槛，也只需要付一次手续费，就能把这些零碎款项合并起来。
The reason I previously made it so high was to allow very large transactions without hitting the transaction fee. The threshold was around 26,000 BTC for transactions made of 50 BTC generated coins. Even though it was 100 times easier to generate back then, only a few people ever encountered the fee at that level. The new threshold puts it at around 11,000 BTC for sending generated coins. It would mostly only be reached with generated bitcoins. If you bought your bitcoins, they'll be denominated in larger transactions and won't be anywhere near the fee limit, unless you bought them in several hundred separate transactions. Even if you do reach the fee level, you only have to pay it once to bundle your little transactions together.
