[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.

from cubicweb.entities import AnyEntity, fetch_config


class Card(AnyEntity):
    __regid__ = 'Card'
    rest_attr = 'wikiid'

    fetch_attrs, cw_fetch_order = fetch_config(['title'])

    def rest_path(self):
        if self.wikiid:
            return '%s/%s' % (str(self.e_schema).lower(),
                              self._cw.url_quote(self.wikiid, safe='/'))
        else:
            return super(Card, self).rest_path()