The MAXEXTENTS parameter of the SETSYS command specifies how many
extents a non-VSAM single-volume data set can have before it is reduced
to fewer extents.
Example: You can add the following command
to the ARCCMD
xx member in each DFSMShsm host:
SETSYS MAXEXTENTS(11)
Note: - The daily statistics report output shows the number of extent
reductions done each day. You can use this information to tune the
SETSYS MAXEXTENTS parameter.
- DFSMShsm does not perform extent reduction for extended format
data sets.
- Using a low MAXEXTENTS value might cause extent reduction to occur
more frequently than you want. If you specify a MAXEXTENTS value,
try using a value of 5 or more.