Rate and RatePerSecond (UserStatistics functions): Difference between revisions
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These functions, which are aliases for each other, return the difference in statistic values between one UserStatistics | These functions, which are aliases for each other, return the difference in statistic values between one UserStatistics | ||
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the two UserStatistics objects were instantiated. | the two UserStatistics objects were instantiated. | ||
The Rate method reports the rate of a ''Model 204'' user [[UserStatistics class#login|Login]] (also called “Final”) statistic. | The Rate method reports the rate of a ''Model 204'' user [[UserStatistics class#login|Login]] (also called “Final”) statistic. | ||
The method cancels the request if it is applied to a statistic | The method cancels the request if it is applied to a statistic | ||
that is exclusively a [[UserStatistics class#request|Request | that is exclusively a [[UserStatistics class#request|Request | ||
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</p> | </p> | ||
==See also== | ==See also== | ||
{{Template:UserStatistics:Rate and RatePerSecond footer}} | |||
{{Template:UserStatistics:Rate footer}} | {{Template:UserStatistics:Rate footer}} | ||
Revision as of 21:12, 14 March 2011
Per second rate of change of statistic (UserStatistics class)
These functions, which are aliases for each other, return the difference in statistic values between one UserStatistics
object and another divided by the number of seconds between the time
the two UserStatistics objects were instantiated.
The Rate method reports the rate of a Model 204 user Login (also called &amp;ldquo;Final&amp;rdquo;) statistic. The method cancels the request if it is applied to a statistic that is exclusively a Request statistic.
RatePerSecond is a synonym for Rate.
Syntax
%number = userStatistics:Rate( ustatOld, string) Throws UnknownStatistic
%number = userStatistics:RatePerSecond( ustatOld, string) Throws UnknownStatistic
Syntax terms
| %num | A numeric variable to contain the rate for the specified statistic. |
|---|---|
| %ustat | A UserStatistics object variable. |
| %ustatOld | An older UserStatistics object variable for the same user login as %ustat. |
| statistic | This case-independent string contains the name of a Model 204 user Login statistic. All other names return an UnknownStatistic exception. |
Usage notes
- The statistics UpdtTime(MS) and LongupdTime(MS) can also be specified without the parentheses: for example, UpdtTimeMs and LongUpdtimeMs, respectively.
- Request statistics are not valid for the Rate method since most don't really make sense for this operation. The Request statistics for which it does make sense (CPU, for example) have corresponding Login statistics that return the exact same difference.
- Some Login statistics (like PCPU) don't really make sense as a rate, but the Rate method returns a rate anyway.
- All rates are rounded to thousandths, except for the CPU statistic. The units for CPU are milliseconds, so CPU rates are rounded to thousandths of a millisecond.
- To get rates with a divisor other than time, use the Difference function.
For example:
%dkrdPerDkpr = %stat:difference(%statOld, 'DKRD') / - %stat:difference(%statOld, 'DKPR')
Examples
The following statement returns the rate for DKRD over the interval from the creation of %ustatOld to the creation of %ustat:
%dkrdPerSecond = %stat:difference(%statOld, 'dkrd')