Estimating
This section contains information about:
about estimating real storage requirements for a virtual=real machine.
Note: The requirements specified here are applicable only to the
Figure 14 lists the various
storage required for each.
r-----
Res iden t nu cleus
Internal trace table
Real control blocks
Permanently allocated
free storage
(virtu al cont rol
blocks and tables).
For installation
control of free
storage, use the
Approximately 152K
Conventionally, 4K of storage is allocated
for each 256K of real storage. This
storage is set aside at
how to increase the size of the internal
trace table.
There is a control block for each real
dev ice, control unit, and channel:
an additional 4K for each 64K of real
storage above 256K.1 This storage is set
aside at
machine requires a virtual machine ,control
block
virtual device, control unit, and channel.
igure 14. Real