Answer
Large documents slow reads and writes, increase RAM usage, and reduce replication and migration performance.
Quick Answer
Large documents hurt performance: they consume more cache space (fewer docs fit in RAM), take longer to transfer over network, and slow down reads even when you only need a few fields (unless you use projection). If you regularly read only part of a document, consider splitting into multiple documents or using projection to avoid fetching unused fields.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ