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Understanding the performance statistics – HP LeftHand P4000 Virtual SAN Appliance Software User Manual

Page 214

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Table 60 Performance Monitor table columns (continued)

Definition

Column

Unit of measure for the statistic.

Units

Current sample value for the statistic.

Value

Lowest recorded sample value of the last 100 samples.

Minimum

Highest recorded sample value of the last 100 samples.

Maximum

Average of the last 100 recorded sample values.

Average

Scaling factor used to fit the data on the graph’s 0 to 100
scale. Only the line on the graph is scaled; the values in

Scale

the table are not scaled. The values in the log file, if you
export the file, are also not scaled.

For information about adding statistics, see

“Adding statistics” (page 217)

.

Understanding the performance statistics

You can select the performance statistics that you want to monitor.

For clusters, volumes, and snapshots, the statistics being reported are based on client IO. This is
the iSCSI traffic and does not include other traffic such as replication, remote snapshots, and
management functions.

For storage systems and devices, the statistics report the total traffic, including iSCSI traffic along
with replication, remote snapshots, and management functions.

The difference between what the cluster, volumes, and snapshots are reporting and what the storage
systems and devices are reporting is the overhead (replication, remote snapshots, and management
functions).

Figure 104 Performance statistics and where they are measured

The following statistics are available:

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Monitoring performance

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