LoadRunner Monitoring Tools

김범수bskim@kbscom.co.kr

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

FixProblemDone

YesNo

Possible Bottlenecks

Application Network Server Machine

LoadRunner 4.5x

LoadRunner3rd 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?