Sometimes build executors seem to be very slow on tycho jenkins
We recently seen some dramatic slowdown on Jenkins build nodes for example this job was aborted after 3(!) hours, sadly short before completing:
https://ci.eclipse.org/tycho/job/tycho-github/job/PR-3203/
If one look at the overview we see that usually it takes roughly 1.5h max:
https://ci.eclipse.org/tycho/job/tycho-github/
This is also comparable to the runtime at the github runners (even though they are often a bit faster than Jenkins):
https://github.com/eclipse-tycho/tycho/actions/workflows/maven.yml
After a restart of the Job this usually works as before and completes in time.
According to my record here: https://github.com/eclipse-tycho/tycho#support-us-with-processing-power
we should have 6 resource packs available so even up to 12 builds as we use the default win 1cpu/4gb but I haven't seen so much builds in parallel yet so there should be some resources left.
So the question would be how can be stabilize the build times or is there any issue in the ci instance that leads to such problems when there is a burst in jobs?