Hitachi Command Suite 8 User Guide

Table 12-2  Volume metrics for USP V/VM and Hitachi USP (IdentifyPerformance Problems wizard)ItemMetricThresholdNotesCacheWrite
Pending
RateCaution: >
30%• Up to 30% is considered normal.
• Frequent or sustained episodes of 40% deserve attention.
• Frequent or sustained episodes to 50% require prompt remediation.
• At 70%, inflow control is enabled which is disruptive.
• High write pending is a sign of back end congestion.Side File
Usage RateCaution:  ≧
10%• This is only applicable for TrueCopy...

composing a DP pool, belong are targeted. The target drives (physical disks)
are all those that compose a DP pool.
In the Identify Performance Problems wizard, the status is judged as Caution
when items exceed the following thresholds.
Table 12-3  Volume metrics for midrange storage (Identify Performance Problems wizard)ItemMetricThresholdNotesProcessorBusy RateCaution: ≧
80%• Values over 66% are likely to be accompanied by response time increases due to contention.
• Values over 50% will mean that the...

Prerequisites
• Install Tuning Manager and link it to HCS.
• Register the Tuning Manager license. • Import the report definition file in Tuning Manager before analyzing performance with the Analytics tab (ensure that you delete the report
definition file for the previous version before importing the latest report
definition file).
• To receive the results of Health Check execution by email, you must specify the SMTP server and edit the server properties file of the Device
Manager server.
• For more...

• If you want to view detailed performance information, start TuningManager from the  Tools menu. By displaying Performance Reporter
reports from Tuning Manager, you can analyzed based on a per-minute
basis or on a long-term trend basis. For details on how to use Performance Reporter, see the  Hitachi Command Suite Tuning
Manager Software User Guide .Tip: The following categories are part of the health check reports, but
are not displayed when using the  Analytics tab. These health check
report...

Tip: If you are using the UR Performance Analysis window of the Replication
tab, and a periodic refresh schedule has been configured for data collection, make sure that storage system health checks (performance reports) run at a
different time to ensure the distribution of processing loads.
Related concepts
•
About analyzing storage system performance  on page 403
Related tasks
•
Creating periodic health check reports for storage systems performance
analysis  on page 412
Exporting health check reports...

Caution threshold range is displayed in yellow. The Warning threshold
range is displayed in pink.
Result
Based on the health check report, resolve performance issues if necessary.Tip:  To delete reports that are no longer needed, select the reports to be
deleted, and click Delete Reports button.
Related concepts
•
About analyzing storage system performance  on page 403
Related tasks
•
Creating periodic health check reports for storage systems performance
analysis  on page 412
•
Exporting health check...

ItemMetricThresholdNotesParity GroupMax Busy RateCaution: ≧
50%,
Warning:
≧ 80%
• -Tip:  If you want to view detailed performance information, start Performance
Reporter. By doing so, you can perform an analysis per minute or a long-
term trend analysis for more performance evaluation items.
Related concepts
•
About analyzing storage system performance  on page 403
Metrics of resources of Universal Storage Platform V/VM and Hitachi
USP (Health Check Report) The following provides the values for...

ItemMetricThresholdNotesWarning: ≧
80%Tip:  If you want to view detailed performance information, start Performance
Reporter. By doing so, you can perform an analysis per minute or a long-
term trend analysis for more performance evaluation items.
Related concepts
•
About analyzing storage system performance  on page 403
Metrics of resources of midrange storage systems (Health Check
Report) The following provides the values for evaluating items that are used byHealth Check to verify whether there is a...

Changing peformance threshold settings to correctly analyze storage
system performance The recommended threshold values for analyzing storage system
performance are set in advance. If the recommended values are not suitable,
change the threshold values. Use the metrics of volumes of each storage system as a reference to change the threshold.
There are four types of thresholds:
• Thresholds that are used only in the Identify Performance Problems wizard.
• Thresholds that are used only in the Health Check...

Result
Metrics are changed for one or more analysis tools.
Related concepts
•
About analyzing storage system performance  on page 403
Related tasks
•
Identifying storage system performance problems  on page 405
•
Analyzing and load balancing MP Blades or MP Units  on page 407
•
Creating periodic health check reports for storage systems performance
analysis  on page 412
Related references
•
Metrics of volumes of Virtual Storage Platform G1000, Virtual Storage
Platform, and HUS VM (Identify Performance...