HP XP P9000 Performance Advisor Software v6.0 User Guide

the XP disk arrays), and the MP blades (applicable only for the P9000 disk arrays) to take the
appropriate action.
HP XP P9000 Performance Advisor analyses the previous average read and write response values
of an LDEV for the duration that you specify in the User Settings screen (see “Setting the duration
to predict the LDEV response time” (page 77)). It computes a reference value based on the actual
data for the specified duration and verifies whether the average read and write response values
of an LDEV are within or beyond the reference value. If the values are high, it displays a for
the corresponding LDEV in the LDEV table. You can also click the to view a graphical
representation of the average read and write response time values in the Chart Work Area. The
graph displays the variations in the average read and write response time of the selected LDEV.
NOTE:
• The reference value used by HP XP P9000 Performance Advisor cannot be configured.
• The corresponds to the average read and write response time variations for an
LDEV.
HP XP P9000 Performance Advisor also displays the duration when the variations were observed.
The durations and the corresponding dates when the load was high on the LDEVs are displayed
in a table. If you do not want to view the table, clear the Show Peak Load check box in the Chart
Work Area.
You can also view the performance graphs related to other metrics to analyze the cause for the
performance load on the LDEVs. The following image shows the variations in the LDEV response
time for 53040, which belongs to the P9500 Disk Array type.
The reference value used by HP XP P9000 Performance Advisor is displayed as a blue straight
line in the LDEV average read and write response time graph.
336 Troubleshooting issues for components associated with applications