[Box-Admins] How does Jenkins start?

[Frank Shearar]

I see all too often that builds fail because the JVM process runs out
of PermGen space. Up until today I'd assumed that was a problem on the
build agents. However, today I bounced my Mac mini (latest victim of
this problem) and... nothing happened. But when I bounced _Jenkins_
the build succeeded.

Jenkins, being a Java process, does have a bunch of knobs that can be
used to adjust GC. How does Jenkins get started? What keeps it
running?

Or, meta-question, how can I find this out for myself, and reduce the
noise on the list? :)

frank