ABAP Memory management - release of unused memory ?

Hello all,

I'm running into SYSTEM_NO_ROLL (Unable to fulfill request for 425097952 bytes of memory space) and have exhausted all avenues of increasing system profile parameters.

In my code, I am able to delete *some* entries from a large internal table that exists in memory, but not all. Hence I do a "DELETE INTERNAL_TABLE WHERE ..." but cannot do a "FREE" or "CLEAR" on the table.

Question is how do I release/reorganize the memory consumed by this table after the DELETE, without doing a FREE ? Or will the ABAP memory management magically do it for me (release the unused memory) ?

Regards and thanks in advance,

Jan

PS: I realize one can move the data to a new table and FREE the old one, but the program design does not allow it.