Answer
The profiler captures slow queries, execution times, scan metrics, and index usage, helping identify unindexed operations, inefficient sorts, and pipeline bottlenecks.
Quick Answer
MongoDB profiler records query execution details to system.profile. Enable with db.setProfilingLevel(1, {slowms: 100}) to capture queries over 100ms. Analyze: look at millis (execution time), nscanned vs nreturned (high ratio = bad index), keysExamined, and the queryPlanner stage. Atlas Profiler provides this in a UI. Regularly review slow query logs in production.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ