Siemens U3585-J-Z125-8-76 1, SM2 monitoring system Glossary Virtual address space subdivision

Glossary

virtual address space subdivision

The virtual address space is subdivided as follows:

1.Class 1 memory

Resident memory for system module code.

The size of this memory segment is specified at system generation time and remains constant for the session.

2.Class 2 memory

Paging memory for system module code.

The size of this memory segment depends on generation specifications and remains constant for the session.

3.Class 3 memory

Resident memory requested dynamically for tables, control blocks and overlay modules.

The size of this memory segment varies during the session.

4.Class 4 memory

Paging memory requested dynamically for tables, control blocks and overlay modules (also shared modules).

The size of this memory segment varies during the session.

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