我们在Heroku上的网站突然关闭，日志中出现以下错误。 知道如何开始解决这个问题吗？尝试过联系支持并等待回复。有没有办法重启Postgres数据库？
2015-12-17T02:45:34.631406+00:00 app[web.2]: OperationalError: could not fork new process for connection: Cannot allocate memory
2015-12-17T02:45:34.631406+00:00 app[web.2]:
2015-12-17T02:45:34.631407+00:00 app[web.2]: could not fork new process for connection: Cannot allocate memory
2015-12-17T02:45:34.631407+00:00 app[web.2]: could not fork new process for connection: Cannot allocate memory 2015-12-17T02:45:34.631408+00:00 app[web.2]: 2015-12-17T02:45:34Z app[postgres.8]:
[DATABASE] could not fork autovacuum worker process: Cannot allocate memory 2015-12-17T02:45:35Z app[postgres.8]:
[DATABASE] could not fork autovacuum worker process: Cannot allocate memory