HP XP Performance Advisor Software - Manual (Page 229)

10 Using charts
This chapter discusses the following topics:
•
“Introduction” (page 229)
•
“Plotting charts” (page 233)
Introduction
You can plot performance graphs to view historical data of components that belong to the same
or different XP disk arrays and P9000 disk arrays. Graphical representation of components
performance metrics is especially useful when you want to compare similar components of different
XP and P9000 disk arrays to determine their performance and observe trends. You can plot
performance graphs of components for different metrics that belong to the following metric
categories:
Unit of measurement Description Metric category
IO/second Provides metrics for measuring the I/Os
from a host to the XP and the P9000 disk
arrays Frontend IO Metrics
MB/second Provides metrics for measuring the
throughput of the I/Os from a host to the
XP and the P9000 disk arrays Frontend MB Metrics
% utilization Provides metrics for measuring the CPU
cycles of the processors that reside on the Utilization Metrics
CHAs and DKAs in the XP disk arrays,
and on the MP blades in the P9000 disk
arrays. In addition, this category also
provides metrics for measuring the cache
and the RAID groups utilization in the XP
and the P9000 disk arrays.
Number of reads Provides metrics for measuring the number
of reads and writes on the disks in the XP Backend Metrics
Number of writes
and the P9000 disk arrays, applies to
RAID groups and physical LDEVs.
Read response time Provides metrics for measuring the read
response time or the write response time Response Time Metrics
Write response time
for the read I/O requests or the write I/O
requests on the XP and the P9000 disk
arrays.
The metrics that you select are component driven, where specific set of metrics are displayed for
the selected components. Related components are categorized to be available for selection under
a common category. For example, all the DKA pairs and their MPs, RAID groups and associated
physical LDEVs and pool LDEVs are grouped in the Back-end category. You can also analyze the
performance of a component by viewing its data points collected at different collection rates in the
same chart. You can compare components across the XP and the P9000 disk arrays based on the
following metric categories. (Ensure that you select every element that you want to appear in your
chart, because the system charts only those elements that are specified):
NOTE: Firmware version later than 50.09.33 snapshot PIDs are available for the XP12000 and
the XP10000 Disk Arrays.
Charts screen
The Charts screen appears when you click Monitoring+Charts in the left pane.
Introduction 229