Alvaro Herrera <alvherre@xxxxxxxxxxxxxxxxx> writes: > In CVS HEAD there is a pg_freespacemap contrib module that may do what > you need. You'd have to "backport" it to 8.1 though; it doesn't compile > as-is. Looking at the CVS history, I think the main point is that freespace.c did not formerly expose its internal data structures; the patch moved a lot of declarations into freespace.h so that the contrib code could get at them. You'd need to modify the 8.1 sources, but not by much. regards, tom lane
