If you can't use a LOAD or IMPORT command (LOAD is faster) then try using this syntax to insert faster:
INSERT INTO DEPARTMENT (DEPTNO, DEPTNAME, ADMRDEPT)
VALUES
(’B11’, ’PURCHASING’, ’B01’),
(’E41’, ’DATABASE ADMINISTRATION’, ’E01’)
etc.
etc.
Insert about 100 rows at once and do a commit, then next 100, etc.
Make the following changes to the db configuration (db2 get db cfg):
Increase the logbufsz to 256.
Increase dbheap by 256 (logbufsz comes out of dbheap).
Increase the num_iocleaners at least 4.
set chngpgs_thresh to 10 (no lower than 20).
set logfilesz to at least 10000.