Dear ,all
i would to ask you about how postgresql optimizer parameters :-
1- random page cost
2- cpu tuple cost
3- cpu operator cost
4- cpu index tuple cost
5- effective cache size
play as parameters in cost estimator equation
i imagine that cost function is the same as
f(x,y,z,....)=ax+by......
cost(cpu tuple cost,cpu operator cost,....)
can any one help me to know the equation that cost estimator used it..
My regard
Radhya,,,,
