Per IRC:
The current Gerrit machine (lead) is having CPU issues. We've stabilized it for now, but need to replace. Needs to be eqiad, row C is best to avoid IP changes. We were looking at WMF4725, but another would do, main requirement is at least 32GB of RAM.
Here's the request for lead: T123132: Need spare server to upgrade/migrate gerrit
Can run jessie, standard partition scheme (large /srv and normal everything else) is what we want/need.