We had very various build times with Maven builds. It was from 15 to 80 minutes. I started to analyze and found a very High file-IO activity. I used "iotop" to find the process.

Then i attached strace (strace -p <pid>) to the process.

There was a very high activity to the files in the directory /var/lib/jenkins/config-history/**
As log the output of strace is attached.

Now I deactivated the plugin and the build time is stable. At the current state it is not usable for us.