[Blue Ocean] Slow page-loading

[midn]

Hello!

I'm using latest BlueOcean from *master* branch, currently updating on daily basis.

I have a strange problem, most of the pages are loading veeeery slowly compared to https://ci.blueocean.io/blue ( I cannot access it now sadly for some reason. )

I see no errors/issues regarding why it could be so slow in Jenkins logs or Nginx logs.

I'm running Jenkins 2.7.2 on Docker on a 16gb mem, 4cpu instance.

Currently the only Pipeline project i have is Multibranch with around ~10 active branches. Project is set to keep only 10 builds for each branch.

Slow examples:

1. Main dashboard - All projects to load takes about ~3 seconds, total around ~20 projects.

Link - https://JENKINSHOST/blue/rest/search/?q=type:pipeline;excludedFromFlattening:jenkins.branch.MultiBranchProject,hudson.matrix.MatrixProject&filter=no-folders&start=0&limit=26

Time - 2.10s

Link - https://JENKINSHOST/sse-gateway/configure?batchId=1

Time - 5.18s

2. Open link to my only Multibranch Pipeline Project, takes about ~10sec to load activity, even though activity shows some file was loaded in ~3 seconds, another 7 seconds it was doing something else, network activity didnt show any new changes.

Link - https://JENKINSHOST/blue/rest/search/?q=type:pipeline;organization:jenkins;excludedFromFlattening:jenkins.branch.MultiBranchProject,hudson.matrix.MatrixProject&filter=no-folders&start=0&limit=26

Time - 2.24s

3. Open details of single build, take around ~10 seconds.

Link - https://JENKINSHOST/blue/rest/organizations/jenkins/pipelines/NAME/branches/feature%252FXXXXXX/runs/4/

Time - 10.87s

Sometimes it seems like to caches some pages and then opening details becomes fast for some, for some it's still extremely slow.

If i compared to https://ci.blueocean.io/blue ( Which i cannot access now :grin: ), blueoceans page was instant on the clicks with much more Activity/Projects.

Any ideas what could be wrong, maybe some Limits in NGINX or Jenkins since BlueOcean is doing quite a lot of requests?

Any help appreciated 

Regards,

Andres

[James Dumay]

Hi Andreas,

Hmm, that doesn't sound great. Could you try accessing Blue Ocean without the proxy and see if it exhibits the same behaviour?

If its not your proxy we will need a few things to help diagnose this:

• Thread dump - "kill -3 $JENKINS_PID" should do the trick and spit the thread dump into your Jenkins log
• Generate a HAR file of the request for the dashboard from start to finish. There's a good guide for doing this in your browser of choice.
• Info about your instance (number of Jobs, version of Jenkins)
• Browser versions

If you can send me the Jenkins server log and the HAR file (jdu...@cloudbees.com) I can get one of the CloudBees engineers to take a look tomorrow.

Regardless its to see you so enthusiastically trying Blue Ocean :)

Thanks,

James

[James Dumay]

Actually, if you can repeat that thread dump command every 5 seconds starting from a few moments before you request the dashboard and after that would give us a better trace.

[James Dumay]

Or every second by the looks of that timing info.

[James Dumay]

Thanks for sending the info through Andreas. You can keep up to date on its status by watching this ticket https://issues.jenkins-ci.org/browse/JENKINS-38079