HP Integrity Virtual Machines Installation, Configuration, and Administration

Table 9-3 Dynamic Memory Characteristics (continued)
DescriptionSettingCharacteristic
The upper bounds for ram_target and
ram_dyn_target_start
valueM (for
megabytes) or
valueG (for
gigabytes)
Maximum memory
The current memory size of the guest (normally equal to target
memory)
valueM (for
megabytes) or
valueG (for
gigabytes)
Current memory
A value for ram_target which can be used to reduce the
guest memory but allow it sufficient memory resources to
continue running a minimal workload.
valueM (for
megabytes) or
valueG (for
gigabytes)
Comfortable minimum
Size of physical memory in the virtual machine presented to
the guest OS.
valueM (for
megabytes) or
valueG (for
gigabytes)
Boot memory
Amount of free memory in the guest
valueM (for
megabytes) or
valueG (for
gigabytes)
Free memory
Amount of memory in the guest allocated by user processes
but not locked. This memory is available for paging and can
be made free.
valueM (for
megabytes) or
valueG (for
gigabytes)
Available memory
A value between 0 and 100 used an indicator of memory deficit
and paging. The higher the number the longer the system has
been in a memory deficit. A memory pressure value
approaching 100 usually means the system is hung.
value
Memory pressure
The allocation chunk size used by dynamic memory when
increasing and descreasing guest memory (as described in
“Specify Sufficient Guest Memory”).
value
Memory chunk size
Dynamic memory can change guest memory size.
started
Driver mode
Control that overrides started. Used by Online Guest
Migration.
enabled
Guest side control is enabled.
guestctl
9.6.1.3 Modifying Guest Memory on the VM Host
A virtual machine can be configured to boot with a very small amount of memory, making the
virtual machine available but maintaining a low overhead on the VM Host system. Because this
operation takes place very early in the boot process, memory is not fragmented and the reduction
in memory size succeeds.
A virtual machine memory size can be increased to any value between the minimum size
(ram_dyn_min) and the maximum size (ram_dyn_max) in increments of the chunk size (64
Mb). You can use the —x option to the hpvmcreate, hpvmclone, and hpvmmodify commands
to specify memory parameters. This command option accepts the keywords listed in Table 9-4.
122 Managing Guests