HP StorageWorks P9000 Performance Advisor Software v5.3 User and Troubleshooting Guide (T1789-96322, August 2011)

14 Troubleshooting issues for components
associated with applications
This chapter discusses the following topics:
• “Introduction” on page 349
• “Associating applications with hosts” on page 351
• “Viewing performance or usage data for components” on page 356
• “Viewing variations in the LDEV response time” on page 364
• “Searching for applications associated with components” on page 355
• “Plotting charts” on page 365
• “Example troubleshooting scenarios” on page 366
Introduction
P9000 Performance Advisor provides a one-stop location to identify bottlenecks in the performance
of applications that reside on hosts and use the XP and the P9000 disk arrays for storing their data.
These hosts are identified using their WWNs and might not have P9000 Performance Advisor host
agents installed.
NOTE:
• In this context, the term 'application' does not include P9000 Performance Advisor. It refers to
applications that reside on hosts and use the XP and P9000 disk arrays to store data. P9000
Performance Advisor helps you identify issues in the performance of such applications.
• Only those XP and P9000 disk arrays for which configuration data is collected using the inband
mode are displayed in the resource selection tree under Troubleshooting. Those XP and P9000
disk arrays for which configuration data is collected using the outband mode are not listed. For
example, if there are three disk arrays (two XP and one P9000 disk arrays) and an inband collec-
tion is performed for the XP disk arrays followed by an outband collection for the P9000 disk array,
the P9000 disk array does not appear in the resource selection tree under Troubleshooting.
• Applications cannot be associated with components that belong to the XP48 Disk Array, as the
WWNs of the hosts connected to the XP48 Disk Array are not available.
An application's response to user requests is determined by the performance of all the associated
LDEVs, which is attributed to the time taken by the LDEVs to process requests. Higher response time
from the LDEVs leads to increase in response time from the applications to user requests. Further, an
LDEV’s response time is based on components associated with that LDEV.
If your application is associated with components that belong to the XP disk arrays, the response time
of an LDEV is determined by the performance of the following components that are associated with
that LDEV:
• Ports (Frontend components)
HP StorageWorks P9000 Performance Advisor Software User Guide 349