// Hacker Noon · 19 April 2026

I Tried to Process 430 Million Transactions on My Laptop… It Failed Badly

Tried processing 430M transactions using DuckDB and session-based logic, but it kept crashing due to memory limits. Random sampling failed because it broke behavioural patterns. Switching to account-level sampling preserved session structure, reduced data size, and made the pipeline work. Key lesson...

Hacker Noon

@hacker-noon · Adeyinka Adejumobi

hackernoon.com

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