Advanced POWER Virtualization on IBM System p5 - Previous ...

Table 6-3 Virtual-processor related tunables
Tunable Min Default Max Description
Entitled capacity delta 1 10 100 The percentage increase of CPU entitled capacity to
add or remove from a shared processor partition. The
value specifies the percent of the partition’s current
entitled capacity to add or remove.
Minimum entitlement
per VP
Maximum entitlement
per VP
0.1 0.5 1.0 The minimum amount of entitled capacity per virtual
processor. This attribute prevents a partition from
having degraded performance by having too many
virtual processors relative to its entitled capacity.
When entitled capacity is removed from a partition,
virtual processors will also be removed if the amount
of entitled capacity for each virtual processor falls
below this number. The default value is 0.5. The
minimum value is 0.1. The maximum value is 1.0.
0.1 0.8 1.0 The maximum amount of entitled capacity per virtual
processor. This attribute controls the amount of
available capacity that may be used by an uncapped
shared processor partition. When entitled capacity is
added to a partition, virtual processors will be added if
the amount of the entitled capacity for each virtual
processor goes above this number. Increasing the
number of virtual processors in an uncapped partition
allows the partition to use more of the available
processor capacity.
Chapter 6. Partition Load Manager 393