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Appendix A Commands of Performance Monitoring/Optimization Function
-hour 30d
Example: The target period of secondary summarizing or direct secondary summarizing is 2 months
before the present date and earlier.
(If the present date is August 15, 2002, the target period of summarizing is before February 15, 2002.)
-day 2m
The -v option outputs the detailed information of summarizing process in the standard output.
For secondary summarizing and direct secondary summarizing, iSMprfarc detects missing information
in the target files of summarizing. If it determines that the statistic information is discontinuous, it
outputs a warning message as the standard error. Summarizing process of the statistic information
continues and configuration information is inserted into the discontinuous point. It assumes that the
configuration has changed from that point.
The summarizing process of iSMprfarc is described below.
First, iSMprfarc determines the period of summarizing in which statistic information is summarized.
When summarizing is done every hour, the period of summarizing starts when the time of obtaining
the first statistic information contained in the set of statistic information recorded in one logging
Interval (statistic information record) crosses over one boundary of time, and ends immediately before
the time of obtaining the first statistic information contained in the successive statistic information
record crosses over the next boundary of time. When summarizing is done every day, the period of
summarizing starts when the time of obtaining the first statistic information contained in the statistic
information record crosses over the change of date and ends on the current date.
If a configuration change occurs, the period of summarizing is divided at the time. A period of
summarizing is also divided at the start and end of recording of statistic information.
iSMprfarc performs the following summarizing processes for various information in the file.
Interval time
For the interval time of each item of statistic information, interval times in each interval of the input
file are accumulated in the period of summarizing. The cumulative value is provided as the
interval time after summarizing.
I/O count
For statistic information items regarding I/O count, the I/O counts in each interval of the input file
are accumulated in the period of summarizing. The cumulative value is provided as the I/O count
after summarizing.
Average Response Time
For statistic information items regarding average response time, the average response time in each
interval of the input file is converted to the average response time of the period of summarizing.
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