[server] use a LifoQueue in _CnxSetPool
In postgresql, some cache is attached to the connection. Using a LifoQueue
(last-in, first-out) makes a few connections to get the most load which give
best performance.
from cubicweb.predicates import is_instance
from cubicweb.hooks import notification
class FolderUpdateHook(notification.EntityUpdateHook):
__select__ = (notification.EntityUpdateHook.__select__
& is_instance('Folder'))
order = 100 # late trigger so that metadata hooks come before.