Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Stop Creating Microservices | Prime Reacts" video.

  1. And while you're running the code as modules, add artificial sleep(2ms) to every call to the module to be prepared for the extra latency you'll suffer when you convert that module to microservice. If you feel that your system is getting too slow, remove that artificial sleep call but understand that you cannot ever change that part as microservice either because the latency would be too bad.
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  2. Reducing microservice latencies by running the microservices on the same machine as the actual service that needs to access the microservice is a total no-go. The whole point of microservices was supposed to be scalability and if the only way to get the latency to acceptable level is to run everything on the same piece of hardware, you obviously cannot scale at all. All you got is extra overhead within the same hardware!
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  3. Microserves would be a great solution to many problems if communication wasn't limited by the speed of light and physical interconnects. When you physically separate all the computation, you are forcing processing to happen in serialized form and overall latency for a given request gets worse.
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  4. I mostly agree. Another option is to make every microservice to have hard deadline that results in good enough user experience. I would say that would be about 10 ms because you often need to combine multiple microservices for a single user visible response and the user experience starts to get worse when total response time goes above 100 ms. When you write a microservice with 10 ms deadline, you practically have to write it in systems programming language such as C, C++ or Rust. Do you have a team for it? Does that team agree that splitting everything into small microservices is the best way forward? If you use Java, Go or other managed language, every time the garbage collection runs stop the world step, all the requests for that microservice instantly fail their deadlines. So obviously you cannot use any of those languages without insane amount of hacks to avoid GC at all times.
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