[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 yams.buildobjs import EntityType, String, Bytes, RichString
class File(EntityType):
"""a downloadable file which may contains binary data"""
title = String(fulltextindexed=True, maxsize=256)
data = Bytes(required=True, description='file to upload')
data_format = String(
required=True, maxsize=128,
description=('MIME type of the file. Should be dynamically set '
'at upload time.'))
data_encoding = String(
maxsize=32,
description=('encoding of the file when it applies (e.g. text). '
'Should be dynamically set at upload time.'))
data_name = String(
required=True, fulltextindexed=True,
description=('name of the file. Should be dynamically set '
'at upload time.'))
data_hash = String(
maxsize=256, # max len of currently available hash alg + prefix is 140
description=('hash of the file. May be set at upload time.'),
__permissions__={'read': ('managers', 'users', 'guests'),
'add': (),
'update': ()})
description = RichString(fulltextindexed=True, internationalizable=True,
default_format='text/rest')