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私はいくつかの奇妙な問題に直面しました。django アプリケーションで単一のワーカーを実行すると? このような：

python manage.py run_gunicorn -w 1
python manage.py runserver

すべてのリクエストは正しく処理されましたが、次のような複数のワーカーを開始した場合:

python manage.py run_gunicorn -w 10

Django は、私の要求の (約) 半分にエラーを返します:

2013-06-13 18:02:39 [10205] [ERROR] Error handling request
Traceback (most recent call last):
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 130, in handle_request
    for item in respiter:
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/raven/middleware.py", line 27, in __call__
    iterable = self.application(environ, start_response)
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 255, in __call__
    response = self.get_response(request)
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 177, in get_response
    signals.got_request_exception.send(sender=self.__class__, request=request)
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 170, in send
    response = receiver(signal=self, sender=sender, **named)
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/__init__.py", line 68, in _rollback_on_exception
    transaction.rollback_unless_managed(using=conn)
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/transaction.py", line 143, in rollback_unless_managed
    connection.rollback_unless_managed()
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/backends/__init__.py", line 232, in rollback_unless_managed
    self._rollback()
  File "/home/mezhenin/venv/karma/local/lib/python2.7/site-packages/django/db/backends/__init__.py", line 59, in _rollback
    return self.connection.rollback()
OperationalError: no connection to the server

Django の DB バックエンドとして sqlite3 を試してみましたが、問題なく動作します。誰かがpsycopg2で同じ問題を抱えていますか?

Django==1.5
gunicorn==0.17.2
psycopg2==2.5
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