How to change MongoDB slowOpThresholdMs in mongo shell

Question

I need to decrease the slowms trash hold to 50, can't find the way of doing that without restarting the mongod process.

Answer 1

The slowOpThresholdMs setting defines what constitutes a “slow” operation. To set the threshold which the profiler considers operations “slow” (and thus, included in the level 1 profiling data), you can configure slowOpThresholdMs at runtime as an argument to the db.setProfilingLevel() operation.

For Ref setProfilingLevel and slowOpThresholdMs

Note: The threshold for slow operations applies to the entire mongod instance. When you change the threshold, you change it for all databases on the instance.

For Example:

{ profile: 1, slowms: 200 }

Database profiling can impact database performance. Enable this option only after careful consideration

Answer 2

Try this: db.setProfilingLevel( 1, 50)