Microservices Part 4: Cold Starts vs Always On

[julia-kafarska]

Full tutorial with screenshots: https://blog.light-cloud.com/tutorials/microservices-on-light-cloud-part-4-cold-starts

Part 4 of 6 of the series Microservices on Light Cloud.

Measure cold starts on Light Cloud with curl, compare scale to zero with an always-on instance, and use real numbers to set timeouts and decide what to keep warm.

Level: Beginner · Time: about 40 minutes, mostly waiting · Plan: Starter · Stack: Node.js, Python, curl

Steps

• Step 1: Let the services scale to zero
• Step 2: Time the first request
• Step 3: What a cold start is made of
• Step 4: Keep one instance warm
• Step 5: What it costs
• Step 6: Decide what to keep warm

Source code: https://github.com/light-cloud-com/tutorial-microservices
Live demo: https://main-web-examples.light-cloud.io

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