The profiler

The profiler============

db.commandHelp("profile")

Levels
0= OFF
1=selective (slow)
2=ON

Setting profile:

Setting profile for Level 2 =>db.setProfilingLevel(2)

Setting profile for logging transaction >3Msecs   => db.setProfilingLevel(1,3)


Checking profile:
db.getProfilingStatus()

show collections  => "system.profile" will be in the collection list

List entries in the profile log=>db.system.profile.find().pretty()

Count number of entries in the profile => db.system.profile.find().count()

display last entry from profile => db.system.profile.find({},sort({$natural:-1}.limit(1).pretty()

display last entry from profile with type of operation query or update or??
=> db.system.profile.find({},{op:1}.sort({$natural:-1}.limit(10).pretty()

CHECKING Profile size=>
db.system.namesapces.find()  - default 1MB in RAM, it's a circular queue

db.system.profile.stats()