Disk volume subsystem performance score, Example 4-7. disk volume performance for \nodea – HP Integrity NonStop J-Series User Manual
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Guardian Performance Analyzer (GPA) User Guide
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Disk Volume Subsystem Performance Score
You can get a further indication of where problems might lie from the Disk Volume
Performance subsection of the report (Example 4-7). This section shows the high- and
low-value extremes for a number of disk volume performance parameters and thus
makes it easy to see whether the disk volume subsystem may be presenting
difficulties. For a properly balanced system, the high and low values should be as
close together as possible.
In Example 4-7 you can see how unevenly the cache calls are distributed among the disk
volumes on this node. Ideally, that is, if the node were perfectly balanced, the nine
volumes in the system would each have about 11 percent of all cache calls.
Example 4-7. Disk Volume Performance for \NODEA
II. DISK VOLUME PERFORMANCE
VOLUME BUSY% REQUEST CPU CACHE REQUEST % OF ALL
QTIME (s) HIT% RATE/SEC CACHE CALLS
LOW BUSY DISK VOL : $X42 .0 0 2: 3 0.0% 0 0%
HI BUSY DISK VOL : $SYSTEM 18.9 25 0: 1 66.1% 12 57%
LOW Q-TIME VOL : $ClO 4.2 19 0: 1 90.2% 3 16%
HI Q-TIME VOL : $PROJEC .0 114 2: 3 99.7% 1 4%
*LOW BUSY DISK PROC: $B40 .1 0 0: 1 0.0% 0 0%
*HI BUSY DISK PROC: $SYSTEM 7.2 25 0: 1 66.1% 12 57%
*LOW CACHE PERF. : $XPRESS 1.7 51 2: 3 52.6% 0 4%
*HI CACHE PERF. : $NSMS 6.3 24 2: 3 99.9% 4 20%
(* relates to the disk process. request-qtime is expressed in Ms).