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Which of the following document configures the threshold which determines whether a query is “slow” for the purpose of the logging system?

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Which of the following document configures the threshold which determines whether a query is “slow” for the purpose of the logging system?

(a) systemLog.verbosity

(b) operationProfiling.mode

(c) operationProfiling.slowOpThresholdMs

(d) none of the mentioned

The question was posed to me in final exam.

Asked question is from Run-time Database Configuration topic in chapter GridFS, BSON Datatype and Administration Concepts of MongoDB

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The correct answer is (c) operationProfiling.slowOpThresholdMs

To explain: systemLog.verbosity controls the amount of logging output that mongod write to the log.

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