HP Matrix Operating Environment Software - Manual (Page 29)

Table 3-1 Percent of time conversions (continued)
Hours/Day
(24–hour day)
Hours/ Week Minutes/ Week Percent of Time
.72 5.04 302.4 3
1.20 8.40 504.0 5
2.40 16.8 1008.0 10
3.60 25.2 1512.0 15
4.80 33.6 2016.0 20
6.00 42.0 2520.0 25
7.20 50.4 3,024.0 30
24.00 168.00 10080.0 100
Understanding utilization limit messages
Percentage of allocation
The utilization limit messages are shown as a percentage of allocation, where allocation is subset of
the given hardware for the system the workload is running on. For example, for a 1-core system,
the allocation is 1 CPU. The CPU utilization limit of 50% would mean 50% of 1 core, or .5 cores.
However, this percentage changes when the hardware (allocation) changes. If 2 additional cores
are added (say through dynamic CPU migration with vPars), the CPU utilization limit of 50%
would mean 50% of 3 cores, or 1.5 cores.
Allocation values for network IO and disk IO are derived from either the highest observed value
for that metric over the entire range of data collected, or a user-specified maximum value.
The allocation values for network and disk may be updated each time utilization data is collected
from the system using the
capcollect command. If a new high observed value occurs during the
time period collected, the network or disk allocation value for the system is increased to reflect
it. This increased value then affects any network or disk utilization limits for workloads on that
system. The current allocation values for a system are displayed on the Profile Viewer page under
Platform Characteristics
.
With sustained limits
A sustained utilization limit could be set such that CPU utilization cannot exceed 50% of allocation
for 20 consecutive minutes, where the allocation of hardware is based upon a 3–core system. The
utilization limit message would read:
CPU utilization may not exceed 50% of allocation or 1.5 cores for more
than 20 minutes.
With percentage of time limits
A percentage of time utilization limit could be set such that CPU utilization cannot exceed 50%
of allocation for more 10% of the time, where the allocation is based upon a 3-core system. The
utilization limit message would read:
CPU utilization may not exceed 50% of allocation or 1.5 cores for more
than 10% of the time.
Scope of utilization limits
Utilization limits can be set to apply broadly or narrowly within the Capacity Advisor user
interface:
Measuring and analyzing resource utilization 29