HP StorageWorks 2/140 embedded web server user guide - Page 86

Port Statistics tab view, Troubleshooting Tip for Port Stats, Parts of Statistics Tables

Page 86 highlights

Monitoring Products Figure 5-2: Port Statistics tab view Troubleshooting Tip for Port Stats As a general rule, you should clear all the counters by choosing Clear Port Stats or Clear All Port Stats after you have resolved a problem. When troubleshooting, keep track of the time interval when errors accumulate to judge the presence and severity of a problem. (There is a link recovery hierarchy implemented in Fibre Channel to handle some level of "expected anomalies.") For troubleshooting purposes, you want to focus on when the errors, as displayed in the Counter column, increment very quickly. Parts of Statistics Tables The tables of statistics contain the following columns: • Statistics - Type of statistic being tracked. • # of Wraps - Number of times the Counter value wraps, for statistics that grow rapidly. The maximum value that either the Counter or the # of Wraps can hold is 232, or 4,294,967,296. Each time the Counter field reaches the maximum value of 232, the wrap count is incremented by 1. • Counter - Number of instances of the tracked item recorded since system initialization or the last time the counters were cleared. 5-4 embedded web server user guide

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5–4
embedded web server user guide
Monitoring Products
Figure 5–2:
Port Statistics tab view
Troubleshooting Tip for Port Stats
As a general rule, you should clear all the counters by choosing
Clear Port Stats
or
Clear All Port Stats
after you have resolved a problem. When troubleshooting, keep
track of the time interval when errors accumulate to judge the presence and severity of
a problem. (There is a link recovery hierarchy implemented in Fibre Channel to
handle some level of “expected anomalies.”) For troubleshooting purposes, you want
to focus on when the errors, as displayed in the
Counter
column, increment very
quickly.
Parts of Statistics Tables
The tables of statistics contain the following columns:
Statistics
— Type of statistic being tracked.
# of Wraps
— Number of times the
Counter
value wraps, for statistics that grow
rapidly. The maximum value that either the
Counter
or the
# of Wraps
can hold
is 2
32
, or 4,294,967,296. Each time the
Counter
field reaches the maximum value
of 2
32
, the wrap count is incremented by 1.
Counter
— Number of instances of the tracked item recorded since system
initialization or the last time the counters were cleared.