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4 reasons why to change Monolith -> Microservice šŸ¤”

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Before moving from monolith to microservice, you should see many indicators that lead you to this conclusion.

In this blog, we will discuss those reasons.

NOTE: They are not 13 reasons, but I am creating a catchy cover šŸ˜‡

1: Code base is super large.

When the code base reaches 100,000 lines of code, you can start thinking of splitting services.


  • Large code bases lead to a long deployment process. Every time you deploy the code, you need to run tests for the whole code and go throw pipelines, which may take an hour, even if you just change a single line of code
  • Lengthy onboarding times for new team members.
  • It became harder to debug or add new features.
  • Things may be tightly coupled, and you need more isolation.

2: Resource Optimization

When you have priority for tasks and want to allocate specific resources for specific parts of your flow, then you can start thinking of splitting services.

Microservices will allow you to easily allocate specific resources to specific services.


  • You may have intensive tasks that consume high CPU resources.
  • Scaling horizontally became expensive.
  • High traffic on different parts of your application
  • Limitation of OS
    • Every Linux machine can handle only 1024 open files at the same time, and you may want more.
    • Maximum TCP connection for sockets is limited to port number 65535.

3: Diverse technology stacks

When you have a need for diverse technology stacks or frameworks within your application (e.g., using different programming languages or databases), microservices allow you to choose the best technology for each service.

4: Improved Team Productivity

If you have many conflicts in the development process and this consumes much time just to solve these conflicts,

Or even your team starts to get larger.

At these times, you can start thinking of splitting services.


Don’t go to microservice unless you really need that, and you also need to know about the cost of this transition.

Microservice isn’t a magic stick; it has costs and consequences, but if you are really aware of them, then microservice may be the solution.