ESX QE450.2 Specifikace stáhnout pdf (Strana 284)

Basic System Administration

284 VMware, Inc.

Collection Level Scenarios

Formostpurposes,settingthecollectionlevelto1or2isadequateforallcollection

intervals.Reasonstousecollectionlev el2:

 Toidentifyvirtualmachinesthatcanbeco‐locatedbecauseofcomplimentary

memorysharing.

 Todetecttheamountofactivememoryonahosttodeterminewhetheritcan

handleadditionalvirtualmachines.

Reasonstousecollectionlevel3:

 TocomparereadyandwaittimesofvirtualCPUstodeterminetheeffectivenessof

VSMP.

 Todiagnoseproblemswithdevices,orcompareperformanceamongmultiple

devices.

Reasonstousecollectionlevel4:

 Todeterminewhetheradeviceisbeingsaturated.

 Totroubleshooterrors.

Level3Allmetricsforallcountergroups,excluding

thoseformaximumandminimumrolluptypes.

Useforshort‐termperformance

monitoringafterencountering

problemsorwhendevice

statisticsarerequired.

Duetothelargequantityof

troubleshootingdataretrieved

andrecorded,uselevel3forthe

shortesttimeperiodpossible—

the

DayorWeekcollection

interval.

Level4Allmetricsforallcountergroupssupportedby

VirtualCenter.

Useforshort‐termperformance

monitoringafterencountering

problemsorwhendevice

statisticsarerequired.

Duetothelargequantityof

troubleshootingdataretrieved

andrecorded,uselevel4forthe

shortestamountoftimepossible.

Table 18-2. Statistic Collection Levels (Continued)

Collection Level Metrics Best Practice

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ESX QE450.2 Specifikace Strana 284