App Engine中Google Cloud SQL的连接限制是什么，以及如何最好地重用数据库连接？

I have a Google App Engine app that uses a Google Cloud SQL instance for storing data. I need my instance to be able to serve hundreds of clients at a time, via restful calls, which each result in one or a handful of DB queries. I've wrapped the methods that need DB access and store the handle to the DB connection in os.environ. See I have a Google App Engine app that uses a Goog