Extract datasource consume a large number of memory

Hi, experts,

I function enhance a datasource, call a function module in exit.

originally, extract data consume a large number of memory, now, call the FM, need more.

use SM66 to monitor, after the FM finish, the memory isnt released, I think it should be released. because all variables is local in the FM.

I want to know why memory isnt released and where memory is consumed

then create memory snapshot before and after call FM via /HMUSA in debug,

then, compare memory snapshot via S_MEMORY_INSPECTOR, but find nothing related to my program

anybody could tell how to solve it and how to use S_MEMORY_INSPECTOR, many tks.

Best regards.