5.49 MEMLOCK (Lock Hercules memory)

5.49.1 Function

The MEMLOCK system parameter is used to lock Hercules memory in storage. It defines the locking
state of the allocated Hercules memory (page lock by host operating system). If the Hercules memory is
locked in storage it cannot be paged out by the host operating system. This may result in some perfor-
mance improvements.

This system parameter is available if Hercules is built with option “_HAVE_MLOCKALL”. Currently
MEMLOCK is only supported under Linux host operating systems.

5.49.2 Syntax

Descriptive

OFF

Diagram

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OFF

5.49.3 Parameter

ON

ON indicates that the memory is to be locked into storage.

OFF

OFF indicates that the memory is not to be locked into the storage.

5.49.4 Examples

Example 1:

Lock the Hercules memory in the storage.

MEMLOCK ON

Example 2:

Do not lock the Hercules memory in the storage.

MEMLOCK OFF

5.50 MODEL (STSI model code)

5.50.1 Function

MODEL specifies the model names returned by the STSI instruction. The optional second, third and the
fourth operands specify the capacity model name, the permanent capacity model name and the tempo-
rary capacity model name respectively.

The default model name, if the MODEL system parameter is not coded, is “EMULATOR”.

5.50.2 Syntax

Descriptive

LATOR hdwmod

[ capmod

[prmmod

[tmpmod ]]]

Diagram

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¬¬ prmmod ¬¬¬§¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬¬«

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5.50.3 Parameter

hdwmodel

This specifies the hardware model name. This can be any name with a maximum
length of 16 characters. Valid characters are A-Z and 0-9. Specifying a “=” resets
the hardware model to “EMULATOR”; specifying an “*” leaves the current hardware
model name intact. If the MODEL system parameter is not specified in the configu-
ration file then the default name is “EMULATOR”.

capmodel

This optional parameter specifies the capacity model name. The capmodel can be
any name with a maximum length of 16 characters. Valid characters are A-Z and 0-
9. Specifying a “=” copies the current hardware model name to the capacity model;
specifying an “*” leaves the current capacity model name intact. The default capa-