複数のリクエストで MongoDB 接続を共有したいと考えています。これは私が今持っているものですが、リクエストごとに新しい接続を作成しているようです。
dbasync = asyncmongo.Client(pool_id='mydb', host='127.0.0.1', port=27017, maxcached=10, maxconnections=50, dbname='bench')
@route('/readAsync')
class ReadAllAsynchHandler(tornado.web.RequestHandler):
@tornado.web.asynchronous
def get(self):
print("getting sessions")
dbasync["ss"].find({}, callback=self._on_response)
def _on_response(self, response, error):
print("on response: %s" % response)
if error:
raise tornado.web.HTTPError(500)
self.finish(SS_TEMPLATE.generate(sessions=response))
1000 の同時クライアントでベンチマークを実行すると、次のエラーが発生します。
Traceback (most recent call last):
File "/home/ubuntu/envs/myproj/local/lib/python2.7/site-packages/tornado/web.py", line 1115, in _stack_context_handle_exception
raise_exc_info((type, value, traceback))
File "/home/ubuntu/envs/myproj/local/lib/python2.7/site-packages/tornado/web.py", line 1298, in wrapper
result = method(self, *args, **kwargs)
File "bench.py", line 29, in get
dbasync["ss"].find({}, callback=self._on_response)
File "/home/ubuntu/envs/myproj/local/lib/python2.7/site-packages/asyncmongo/cursor.py", line 380, in find
connection = self.__pool.connection()
File "/home/ubuntu/envs/myproj/local/lib/python2.7/site-packages/asyncmongo/pool.py", line 116, in connection
raise TooManyConnections("%d connections are already equal to the max: %d" % (self._connections, self._maxconnections))
TooManyConnections: 50 connections are already equal to the max: 50
DEBUG:root:dropping connection. connection pool (10) is full. maxcached 10