Specifications

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