MongoDB logging. Please note that logging negatively impacts performance and should be disabled for high-performance production apps. MONGODB admin['$cmd'].find({:ismaster=>1}) MONGODB admin['$cmd'].find({:ismaster=>1}) MongoDB logging. Please note that logging negatively impacts performance and should be disabled for high-performance production apps. MONGODB admin['$cmd'].find({:ismaster=>1}) MONGODB admin['$cmd'].find({:ismaster=>1})