> And no amount of green threads will allow you to outsmart the Amdahl's law. The only thing you can do is to return 200 OK before the transaction is committed,

> And no amount of green threads will allow you to outsmart the Amdahl's law. The only thing you can do is to return 200 OK before the transaction is committed, Ignoring all the wild assumptions and made up numbers here, this again has nothing to do with Amdahl's law because the "serial" part is unnecessary synchronization and waiting, not unavoidable serial computation. If you have a thousand web servers, having all of them wait to sync would be the exact thing anyone spending millions on servers would work to avoid. To start at the obvious bare basics, if only one computer can sync at one time, you might as well just use one computer. Computers are queues and buffers all the way down and all the way up to the network level. A single computer or core merging data is not Amdahl's law. There is no reason computation resources have to wait on some other resource synchronizing, and this is not serial computation, which is what Amdahl's law is about.