How to find queries not using indexes or slow in mongodb

Question

is there a way to find queries in mongodb that are not using Indexes or are SLOW? In MySQL that is possible with the following settings inside configuration file:

Answer 1

You can use the following two mongod options. The first option fails queries not using index (V 2.4 only), the second records queries slower than some ms threshold (default is 100ms)

--notablescan

Forbids operations that require a table scan.

--slowms 

Defines the value of “slow,” for the --profile option. The database logs all slow queries to the log, even when the profiler is not turned on. When the database profiler is on, mongod the profiler writes to the system.profile collection. See the profile command for more information on the database profiler.