Performance tuning in Jenkins - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the Jenkins executor count to improve parallel builds.

Jenkins

jenkins.model.Jenkins.instance.setNumExecutors([1])

Drag options to blanks, or click blank then click option'

A0

B5

C-1

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Setting executors to 0 disables builds.

Negative numbers cause errors.

Setting the number of executors to 10 allows Jenkins to run 10 builds in parallel, improving performance.

2fill in blank

medium

Complete the code to enable the Jenkins build queue to timeout after a certain period.

Jenkins

jenkins.model.Jenkins.instance.getQueue().setBuildableTimeout([1])

Drag options to blanks, or click blank then click option'

A600000

B30000

C0

D-100

Attempts:

3 left

💡 Hint

Common Mistakes

Using zero disables timeout.

Negative values cause errors.

600000 milliseconds (10 minutes) sets a reasonable timeout for build queue items to wait before timing out.

3fill in blank

hard

Fix the error in the code to properly set the Jenkins system message for performance monitoring.

Jenkins

jenkins.model.Jenkins.instance.setSystemMessage([1])

Drag options to blanks, or click blank then click option'

APerformance tuning enabled

B"Performance tuning enabled"

CPerformance tuning enabled;

D'Performance tuning enabled'

Attempts:

3 left

💡 Hint

Common Mistakes

Missing quotes cause syntax errors.

Adding semicolons is unnecessary here.

The system message must be a string, so it needs to be enclosed in double quotes.

4fill in blank

hard

Fill both blanks to create a map of job names to their last build duration in milliseconds.

Jenkins

def durations = jenkins.model.Jenkins.instance.getAllItems().collectEntries { job -> [job.[1], job.getLastBuild()?.[2] ?: 0] }

Drag options to blanks, or click blank then click option'

Aname

Bduration

Ctimestamp

DgetDuration

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'duration' property directly causes errors.

Using 'timestamp' gives build start time, not duration.

Use 'name' to get the job name and 'getDuration' method to get the last build duration.

5fill in blank

hard

Fill all three blanks to filter jobs with last build duration greater than 5 minutes and create a map of job names to durations.

Jenkins

def slowJobs = jenkins.model.Jenkins.instance.getAllItems().findAll { job -> job.getLastBuild()?.[1] ?: 0 [2] [3] } .collectEntries { job -> [job.name, job.getLastBuild().getDuration()] }

Drag options to blanks, or click blank then click option'

AgetDuration()

B>

C300000

Dduration

Attempts:

3 left

💡 Hint

Common Mistakes

Using property 'duration' instead of method causes errors.

Using '<' instead of '>' reverses the filter.

Use 'getDuration()' to get build duration, '>' to compare, and 300000 milliseconds (5 minutes) as the threshold.