Using Gprof with Postgresql

Hi All,

I compile PostgreSQL-8.4.0 with icc and --enable profiling option. I
ran command psql and create table and make a select then I quit psql
and go to .../data/gprof folder there are some folders named with
numbers (I think they are query ids); all of them are empty. How can I
solve this issue?

Reydan