Specifications

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Thisappendixliststhemetrics,orcounters,availablefordisplayinperformancecharts.
TheavailabilityofsomecountersdependsontheStatisticsCollectionLevelsetting(see
“A b o u t CollectionIntervalsandCollectionLevels”onpage 282).Changestochart
optionstakeeffectafterthecurrentdatacollectioncycleiscompleteandthe
nextcycle
begins.
Countershaverollupandstatisticstypecharacteristics.Ametric’srollupreferstowhat
typeofmeasurementisbeingpresented.Rolluptypesincludethefollowing:
 Average–Datacollectedforthespecifieddurationisaveraged.Themeasurement
displayedinthechartrepresentsanaverageforthedurationofthedatacollection
cycle.
 Summation–Datacollectedissummed.Themeasurementdisplayedinthechart
representsthesumofdatacollectedduringthecollectioncycle.
 Latest–Datacollectedisasetvalue.Themeasurementdisplayedinthechart
representsthecurrentsetting.
 Minimum–Datacollectedisaveraged.Themeasurementdisplayedinthechart
representstheaverageminimumvalueforthedurationofthedatacollectioncycle.
 Maximum–Datacollectedisaveraged.Themeasurementdisplayedinthechart
representstheaveragemaximumvalueforthedurationofthedatacollection
cycle.
Ametric’sstatisticstypereferstowhetherthemeasurementrepresentsachangedvalue
(Delta),anabsolutevalue(Absolute),oraratio(Rate).
Performance Chart Metrics
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