P9000Watch and P9000Sketch Reference guide for HP StorageWorks P9000 Performance Advisor v5.3 (T1789-96325, August 2011)

Understanding performance metrics ............................................................................................ 45
Array Performance Metrics ................................................................................................... 48
Host Group performance metrics .......................................................................................... 48
Port performance metrics ..................................................................................................... 49
LDEV performance metrics ................................................................................................... 49
RAID group performance metrics .......................................................................................... 50
CPU performance metrics .................................................................................................... 51
DKC performance metrics .................................................................................................... 52
5 Introduction to P9000Sketch .............................................................. 55
Overview ................................................................................................................................. 55
6 Installing P9000Sketch ..................................................................... 57
Supported Windows platforms ................................................................................................... 57
Installing P9000Sketch .............................................................................................................. 57
7 Viewing performance metrics in P9000Sketch ...................................... 61
Loading the Comma separated file .............................................................................................. 61
Setting the Java heap size value ................................................................................................. 62
Viewing performance metrics in P9000Sketch .............................................................................. 62
Understanding performance metrics in P9000Sketch ..................................................................... 65
8 Working with charts in P9000Sketch .................................................. 69
Viewing charts ......................................................................................................................... 69
Modifying chart properties ......................................................................................................... 69
Restoring auto range settings on the chart .................................................................................... 70
Saving and printing the chart ..................................................................................................... 70
A P9000Watch use case scenarios ....................................................... 71
Scenario 1: Port I/O spike ......................................................................................................... 71
Business case ..................................................................................................................... 71
Objective .......................................................................................................................... 71
Resolution ......................................................................................................................... 71
Results .............................................................................................................................. 71
Scenario 2: Poor application response ......................................................................................... 71
Business case ..................................................................................................................... 71
Objective .......................................................................................................................... 72
Resolution ......................................................................................................................... 72
Results .............................................................................................................................. 72
B Understanding write ratio in P9000Watch ........................................... 73
C Relationship between LDEV I/O response time and Write ratio .............. 75
D Comparing LDEV response time metrics in P9000 Performance Advisor
and P9000Watch ............................................................................... 77
Maximum values of LDEV response time in P9000 Performance Advisor and P9000Watch ................. 77
Average values of LDEV response time in P9000 Performance Advisor and P9000Watch ................... 77
Average read response time ................................................................................................ 77
Average write response time ................................................................................................ 77
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