Clear sap memory

Hi,

How to clear or free the sap memory during the run time?

I have tried few scenarios.

REPORT  ZSAP_MEMORY.

DATA : VALUE1(30) TYPE C VALUE 'SAP MEMORY'.

PARAMETER : MATNR TYPE MARA-MATNR.

SET PARAMETER ID 'MEM' FIELD VALUE1.

FREE MEMORY ID 'MEM'.

DELETE FROM MEMORY ID 'MEM'.

I have tried this below method using space, it is working fine. but i am sure this is  not the correct way.

SET PARAMETER ID 'MEM' FIELD ' '.

please suggest.

Regards,

MOHANA