Hp 3PAR System Reporter Software Bedienungsanleitung PDF herunterladen (Seite 328)

10.36

The Sample Data and Inventory Tables

3PAR System Reporter User’s Guide System Reporter 2.8

10.4.9.2 Service Time Histogram Buckets

The service time range corresponding to each of the rhist and whist buckets depends on the

version of the InFormOS (os_rev column in the system table, see The system Table on

page 10.4). For os_rev prior to 2.2.2, the nth bucket (rhistn and whistn) correspond to service

times from the previous bucket to (2

*4.096/mhz) millisec where mhz is the mhz column in the

system_3 table (see The system Table on page 10.4). This means that service time histograms

from systems with different CPU frequencies could not be correctly aggregated. Beginning

with the 2.2.2 release, the buckets were made independent of the CPU frequency, and the nth

bucket (rhistn and whistn) corresponds to service times from the previous bucket to (2

n-7

)

millisec.

10.4.9.3 IO Size Histogram Buckets

There are16 IO Size buckets correspond IO sizes 512 bytes to 16MiBytes. The nth bucket holds

the count for IO Sizes from the previous bucket’s max size to 512 * 2

bytes.

Total IO Size

(KBytes)

CASE WHEN (d_rcount + d_wcount) > 0 THEN (d_rbytes +

d_wbytes) / ((d_rcount + d_wcount) * 1000.0) ELSE 0 END

Queue length CASE WHEN qlen > 0 THEN qlen ELSE 0 END

The check for qlen > 0 is because qlen < 0 indicates that qlen is

invalid for that sample.

Busy% AVG(CASE WHEN ((d_now > 0) AND (d_busy < busy)) THEN

(d_busy * 100.0/d_now) ELSE 0 END)

Table 10-20. Common Performance Metrics for a Sample Row

Metric SQL Expression

1 2 ... 323 324 325 326 327 328 329 330 331 332 333 ... 377 378

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Hp 3PAR System Reporter Software Bedienungsanleitung Seite 328