Scaling horizontally by adding more copies of the same function doesn't significantly increase cold starts. However, scaling vertically by adding many different, low-traffic functions is problematic. When you have dozens of functions that only get called occasionally, each one can go cold between requests, leading to cold starts occurring constantly across your entire system as traffic gets split up and nothing stays 'warm' consistently.
Scaling horizontally by adding more copies of the same function doesn't significantly increase cold starts. However, scaling vertically by adding many different, low-traffic functions is problematic. When you have dozens of functions that only get called occasionally, each one can go cold between requests, leading to cold starts occurring constantly across your entire system as traffic gets split up and nothing stays 'warm' consistently.
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Scaling horizontally by adding more copies of the same function doesn't significantly increase cold starts. However, scaling vertically by adding many different, low-traffic functions is problematic. When you have dozens of functions that only get called occasionally, each one can go cold between requests, leading to cold starts occurring constantly across your entire system as traffic gets split up and nothing stays 'warm' consistently.
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