Hey many updates is too many for a rollback?

I wrote a script that seems like it enters an infinite loop or something.. I begin running it and it doesn't want to end..

my question is by setting a savepoint at the beginning of the script am I blowing the stack? the script makes about 260 000 insertions, i set the savepoint before all insertions and a rollback on error.

after running the script i checked out the tables and the script actually did what it was supposed to do other than terminate.. what's the deal?

DECLARE
   today DATE := SYSDATE;
   creator VARCHAR2(80) := 'ETDS_MIG';
   next_actr_seq_no NUMBER(10,0);
   
   CURSOR all_contacts IS
      SELECT c.contact_id
      FROM   dbo_contacts c
      WHERE  c.contact_id NOT
                IN (SELECT   acm.contact_id
                    FROM     tmp_actr_cntct_map acm);
                 
BEGIN
   
   SAVEPOINT new_contact_map_entries;
   
   FOR i IN all_contacts LOOP
   
      SELECT   tmp_actr_seq_no.nextval
      INTO     next_actr_seq_no
      FROM     dual;
     
      INSERT
      INTO     tmp_actr_cntct_map
               (actr_seq_no,
                contact_id)
      VALUES   (next_actr_seq_no,
                i.contact_id);
                
      INSERT   -- Insert actr_seq_no into actor table
      INTO     etds_actr_tbl
               (actr_seq_no,
                actr_nte_txt,
                actr_ste_seq_no,
                xpry_dt,
                actr_del_ind,
                actr_del_dt,
                rec_creatd_dt,
                rec_creatd_usr_nm,
                rec_ltst_chng_dt,
                rec_ltst_chng_usr_nm)
      VALUES   (next_actr_seq_no,
                NULL,
                1,        -- Default as ACTIVE = actor state
                NULL,     -- Default to no expiry date
                0,        -- Default to not deleted
                NULL,     -- Default to not deleted
                today,    -- Default to sysdate = created date
                creator,  -- Default to ETDS_MIG = creator
                today,    -- Default to sysdate = latest change date
                creator); -- Default to ETDS_MIG = latest change user
      COMMIT;
   END LOOP;
   
   
   DELETE
   FROM     tmp_actr_cntct_map acm
   WHERE    acm.contact_id NOT
               IN (SELECT   c.contact_id
                   FROM     dbo_contacts c);
   COMMIT;
   
   DELETE
   FROM     etds_cntct_tbl c
   WHERE    c.actr_seq_no NOT
               IN (SELECT   acm.actr_seq_no
                   FROM     tmp_actr_cntct_map acm);
   COMMIT;
   
EXCEPTION
   WHEN others THEN
      RAISE_APPLICATION_ERROR(-20010, 'ERROR in update_tmp_actr_cntct_map.sql.');
      DBMS_OUTPUT.put_line('ERROR in update_tmp_actr_cntct_map.sql.');
      ROLLBACK TO new_contact_map_entries;
   
END;

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