memory leaks分析和总结分析和总结.docx

Thetask:

ItneedsperformtestingofWebservertodiscovermemoryleaks.

Thesolutio:n

CreateLoadRunnerVuGenscriptforyourapplication(Webserverinmyscript)Letssuppose,wehavedoneit:

Actually,IwillexplaindifferenttricksandfeaturesofVuGenscriptsinthefurtherposts.

CreateLoadRunnerControllerscenarioforyourapplicationusingtheVuGenscripts.

Hereitis:

Thenextstepistoaddmeasurementmonitorswhicharequantitativeindicatorsofresourcesbeingmonitored(forexample,memoryusage,CPUusage,handleand

threadcount,andsoon).

Forthat,onRuntabintheLoadRunnerController,dragWindowsResourcesitemfromtheAvailableGraphstreeanddropittographsarea.

Seethescreenshot:

Thenright-clickonthejustaddedgraph(WindowsResources)andselectAddMeasurementsfromthepop-upmenu.

WindowsResourcesdialogwillbeshown:

Thefollowingactionsareeasy.Iwilladdthenameofserverwherethe

application(Webserverinmycase)willberun.Thisservercanbearemoteone.Inthiscase,youhavetomakesurethatLoadRunnerwillhaveanaccesstogetinfofromtheremotecomputer.Usually,IprovideadministratorrightsforuserwhichexecutesLRscripts.

AfterthatIselectcountersIwanttomeasureduringtheloadtesting:

So,WindowsResourcesdialoglookslike:

Iselectedthefollowingcounters:

%UserTimefortwoprocesses(RServicetomcat5)andthewholesystem(_Total)

Availablebytesinthesystem

Handlecounts

Threadcounts

WorkingSets

AlsoyoumaywishtoaddPrivateBytescounter.DescriptionforeachcounterisavailableonWindowsResourcesdialog.Obviouslythatthesetofcountersdependsontherequirementsandsoftwaretobetested.

Payattention...IfyouselecttheWindowsResourcesgraph,thelistofcounterwillbeshowninthelowerpartoftheLoadRunnerController:

Ourmissionisalmostcomplete:)Wehavetorunthescenarioagainstanumberofconcurrentusers(Iuser30users)andobserve