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Team repeats database fix after original reasoning is lost due to lack of documentation

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A team once implemented a read replica to resolve database latency during peak loads, which was successful. Eighteen months later, a new engineer, unaware of the original reason, removed the replica to simplify the system. Shortly after its removal, the database latency problems reoccurred during high traffic. The core failure was not the technical decision but the lack of documented reasoning for it, leading the team to solve the same problem twice.

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Team repeats database fix after original reasoning is lost due to lack of documentation · ShortSingh