IBM 000-8697 Manuale Utente Pagina 117

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System Architecture 2-23
OnLine User Processes
Figure 2-2illustratesthevirtualaddressspaceof a user processafterthe user
process has attached to shared memory. For a detailed discussion of how a
user process attaches to shared memory, refer to page 2-24.
Figure 2-2
An example of a
user process virtual
address space.
Depending on the
machine, shared
memory is
allocated “above”
or “below” the
value of SHMBASE.
Unallocated space
OnLine shared-
memory
segments
SHMBASE
Private data
Shareddatabaseserver code
(C program text)
User process virtual
address space
UNIX memory
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