MongoDB
C100DBA · Question #64
If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?
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Performance Tuning
Question
If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?
Options
- ANone of the above
- BThe query used an index to fetch the results
- CThe query returned 0 documents
- DThe query returned 30000 documents after scanning the documents
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Topics
#explain output#index usage#totalDocsExamined#totalKeysExamined