I'm a Distinguished Software Engineer writing code for more than 27 years. I've done everything from coding for embedded processors of medical devices to 3D game engines to high availability web apps.
Caching is a good thing (except when it isn't :) ). We use caching heavily. Increasing cache size would have a positive effect (and be simpler), but completely splitting out all read traffic was expected to have a much bigger impact and also allow for better long term scaling.
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Caching is a good thing (except when it isn't :) ). We use caching heavily. Increasing cache size would have a positive effect (and be simpler), but completely splitting out all read traffic was expected to have a much bigger impact and also allow for better long term scaling.