Automatically Pack The ZODB

Add Products.ClockServer to your egg section in buildout.cfg

Add something like this in your instance section

zope-conf-additional = 
    <clock-server>
      method /pack_it_all
      period 86400
      user admin
      password password
      host localhost
   </clock-server>

Re-run buildout
Start server
In the root of zope, create a "Script(Python)" with the id of "pack_it_all"

To the contents, add something like this,

dbs=context.Control_Panel.Database
names = dbs.getDatabaseNames()

for name in names:
  if name != 'temporary':
    dbs[name].manage_pack(days=3)
    print "packed %s" % name

return printed

This will pack all the databases you have in Zope once a day