LoadRunner Monitoring Tools 김범수 한국비지네스써비스 ( 주 )

Where is the bottleneck?

Agenda  Definition of problem  Using the Transaction Breakdown facility  Using the Network Monitor  Using the Resource Monitor

Definition of Problem  Transaction timings indicate that a problem exists but does not tell where the problem lies

Load Testing Process Run Scenario Analyze Results Results OK? Pinpoint Problem Fix Problem Done Yes No

Possible Bottlenecks  Application  Network  Server Machine

LoadRunner 4.5x LoadRunner 3rd Party Tools

LoadRunner 5.x LoadRunner

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

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

Enabling Transaction Breakdown(2)

Transaction Breakdown Graphs  Percentile  Performance Under Load  Transaction Performance

Transaction Breakdown Example

Locking Indicates Application Problem Developer

Fix DB Locking Problem  Programmer can modify code to prevent locking  Enable transaction breakdown facility  Rerun scenario  Analyze results

Is Locking Problem Fixed?

Network Time Not Acceptable Network Admin

Network Monitoring  Determine if network is causing delay  Determine problematic node

Network Monitoring Elements  Path delay  Segment delay  Timeouts  Path delay under load  Segment delay under load

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

Enabling Network Monitoring(2)

Determine the Problem Segment

Fix Network Problem  Make any network changes  Rerun scenario  View Networking Monitor and Transaction Breakdown results

Is Network Problem Fixed?

Resource Monitor  Monitors machine’s 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

Example Measurements  CPU Utilization  Paging  Swapping  Inbound/Outbound packet rate

Selecting Monitors

Selecting Monitors (2)

Server Monitor Example

Resource Monitor Graphs  “measurement” information  “measurement” under load

Resource Monitor Graphs(2)

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

Questions?