CODEWITHSUNDEEP
jenkins
Chris Hansen
Chris Hansen

Reputation: 8653

Jenkins server is running slow

My Jenkins server is so slow. Java takes 120% or CPU. How can I give Jenkins more memory access.

Of what steps can I take to improve the load time for Jenkins

Upvotes: 8

Views: 31407

Answers (3)

Naveen Goyal
Naveen Goyal

Reputation: 1

Manage Jenkins -> Configure System - > Robot Framework Deselect checkbox as -> [Display "Robot Results" column in the job list view ]

Please look here for detailed screenshot

Upvotes: 0

Priyam Gupta
Priyam Gupta

Reputation: 250

You can allocate more memory and swap heap sizes using the following commands.

These can be set in the job configuration or Jenkins -> Manage -> Configure

-Xmx512m
-XX:MaxPermSize=128m

Upvotes: 5

Alex O
Alex O

Reputation: 8164

If Java memory is causing the problem, then you can add more heap via the -Xmx option, as suggested in Priyam's answer. By default, JVM limits heap to 25% of your available RAM.

More heap has a caveat, though: if you add heap in the range of several GB, then the default JVM garbage collection algorithm will periodically impose stop-the-world breaks in the range of several seconds. You then need to switch to a custom garbage collection algorithm (like, CMS) and then carefully tune its parameters.

If adding more heap does not fix your problem, then you need to dig deeper. There's a plethora of possible root causes for a slow master -- from JVM memory and garbage collection settings to plugin issues, on top of the usual CPU/disk/IO-dimensioning issues.

Upvotes: 9

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