Preheat oven to 350°F (175°C). Grease a 14-cup Bundt pan. Sprinkle 1 cup toasted pecans evenly in the bottom of the pan.
Stir together the flour, sugar, baking soda, cinnamon, and salt. Stir in the eggs, bananas, pineapple, oil, and vanilla. Stir just until the dry ingredients are moistened. Spoon the batter evenly in the prepared pan.
Bake for 60-70 minutes, or until a cake tester inserted in the center comes out clean. Cool in pan on wire rack for 15 minutes. Then, transfer the cake to a wire rack to cool completely.
To make the glaze:
Using an electric mixer on medium speed, beat the cream cheese, sugar, vanilla, and 1 tablespoon milk until well-blended. Continue mixing and add about a teaspoonful of milk at a time until the mixture is smooth and pourable.
Pour the glaze over cooled cake. Sprinkle the remaining 1/2 cup pecans over top of glaze.