LoadRunner Monitoring Tools

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LoadRunner Monitoring Tools

• ???
• bskim_at_kbscom.co.kr
• ?????????(?)

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Where is the bottleneck?
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Agenda

• Definition of problem
• Using the Transaction Breakdown facility
• Using the Network Monitor
• Using the Resource Monitor

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Definition of Problem

• Transaction timings indicate that a problem
  exists but does not tell where the problem lies

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Load Testing Process
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Possible Bottlenecks

• Application
• Network
• Server Machine

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LoadRunner 4.5x
LoadRunner
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LoadRunner 5.x
LoadRunner
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Transaction Breakdown

• Currently available only for 2-tier Oracle
• Gives a general idea of where the problem lies
• Breaks transaction into 5 elements
• Network Client
• CPU
• I/O
• Database locks
• Other

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Enabling Transaction Breakdown

• Install LoadRunner agent on Oracle Server
• Enable transaction breakdown option in the
  controller
• Run Scenario
• Analyze results
• Click transaction breakdown option on the toolbar

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Enabling Transaction Breakdown(2)
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Transaction Breakdown Graphs

• Percentile
• Performance Under Load
• Transaction Performance

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Transaction Breakdown Example
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Locking Indicates Application Problem
Developer
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Fix DB Locking Problem

• Programmer can modify code to prevent locking
• Enable transaction breakdown facility
• Rerun scenario
• Analyze results

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Is Locking Problem Fixed?
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Network Time Not Acceptable
Network Admin
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Network Monitoring

• Determine if network is causing delay
• Determine problematic node

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Network Monitoring Elements

• Path delay
• Segment delay
• Timeouts
• Path delay under load
• Segment delay under load

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Enabling Network Monitoring

• Not necessary to install LoadRunner
• Enable Network Monitoring option
• Run Scenario
• Analyze results

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Enabling Network Monitoring(2)
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Determine the Problem Segment
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Fix Network Problem

• Make any network changes
• Rerun scenario
• View Networking Monitor and Transaction Breakdown
  results

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Is Network Problem Fixed?
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Resource Monitor

• Monitors machines resources during scenario run
• Displays these resources in real time
• NT measurements correspond to those available
  from the NT Performance Monitor
• Unix measurements correspond to those available
  from the rstat daemon

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Example Measurements

• CPU Utilization
• Paging
• Swapping
• Inbound/Outbound packet rate

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Selecting Monitors
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Selecting Monitors (2)
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Server Monitor Example
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Resource Monitor Graphs

• measurement information
• measurement under load

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Resource Monitor Graphs(2)
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Summary

• Run a scenario
• Analyze results
• If results ok - done
• If not ok
• Use transaction breakdown to pinpoint problem
• Use network resource monitors to further
  analyze the problem
• Fix problem
• Go back to step one

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Questions?