HP Capacity Advisor 7.2 User Guide

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Contents

1 Introduction.............................................................................................11

Setup considerations...............................................................................................................12

Licensing requirements........................................................................................................12

Installation........................................................................................................................12

Collection methods.............................................................................................................12

Disk space requirements ....................................................................................................12

Credentials.......................................................................................................................13

Dependencies...................................................................................................................13

Upgrades and reinstallation.....................................................................................................13

Upgrading agents on HP-UX or OpenVMS managed systems..................................................13

Navigating within Matrix OE and Capacity Advisor ...................................................................13

2 Features..................................................................................................15

Data collection.......................................................................................................................16

Data collection infrastructure................................................................................................16

Supported collection configurations......................................................................................18

Comparison of agentless and UP data collection....................................................................18

HP ICperf data differs from Utilization Provider data...............................................................19

Differences in memory data ...........................................................................................19

Differences in network data ...........................................................................................20

Related topics..........................................................................................................20

Experimentation.....................................................................................................................20

Sizing for service level objectives..............................................................................................21

Modeling considerations.........................................................................................................22

Capacity Advisor commands....................................................................................................22

3 Key Capacity Advisor concepts..................................................................23

Capacity planning goals.........................................................................................................23

Quality of service .............................................................................................................23

Utilization monitor, calculator, and simulator..............................................................................23

Data handling for virtual machines.......................................................................................23

Data normalization............................................................................................................24

Resources for which Capacity Advisor collects data.....................................................................24

Upper bounds...................................................................................................................24

Measuring and analyzing resource utilization.............................................................................25

Peaks and sums.................................................................................................................25

Sampling interval...............................................................................................................25

Headroom........................................................................................................................25

Headroom star rating....................................................................................................26

Interpreting the headroom star rating..........................................................................26

Missing or invalid data.......................................................................................................27

The affect of invalid data on HP Smart Solver solution finding.............................................28

Utilization limits ................................................................................................................28

Specifying utilization limits..............................................................................................28

Sustained time limits.................................................................................................29

Percentage of time limits............................................................................................29

Understanding utilization limit messages...........................................................................30

Percentage of allocation............................................................................................30

With sustained limits.................................................................................................30

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