n= 6816 

node), split, n, loss, yval, (yprob)
      * denotes terminal node

1) root 6816 2663 fail (0.6093016 0.3906984)  
  2) transaction_isolation=READ-COMMITTED,READ-UNCOMMITTED,SERIALIZABLE 4153    0 fail (1.0000000 0.0000000) *
  3) transaction_isolation=NULL,REPEATABLE-READ 2663    0 pass (0.0000000 1.0000000) *