[server] Make connection pooler configurable and set better default values
Drop the configuration connections-pool-size and add new configurations options:
* connections-pool-min-size. Set to 0 by default so we open connections only
when needed. This avoid opening min-size*processes connections at startup,
which is, it think, a good default.
* connections-pool-max-size. Set to 0 (unlimited) by default, so we move the
bottleneck to postgresql.
* connections-idle-timeout. Set to 10 minutes. I don't have arguments about
this except that this is the default in pgbouncer.
# copyright 2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from yams.buildobjs import EntityType, String, Int, SubjectRelation, RelationDefinition
from cubicweb import _
THISYEAR = 2014
class Person(EntityType):
name = String()
salaire = Int()
birth_year = Int(required=True)
travaille = SubjectRelation('Societe')
age = Int(formula='Any %d - D WHERE X birth_year D' % THISYEAR)
class Societe(EntityType):
nom = String()
salaire_total = Int(formula='Any SUM(SA) GROUPBY X WHERE P travaille X, P salaire SA')
class Agent(EntityType):
asalae_id = String(formula='Any E WHERE M mirror_of X, M extid E')
class MirrorEntity(EntityType):
extid = String(required=True, unique=True,
description=_('external identifier of the object'))
class mirror_of(RelationDefinition):
subject = 'MirrorEntity'
object = ('Agent', 'Societe')
cardinality = '?*'
inlined = True