Django-PostgreSQL-每个页面都建立新连接

Question

settings.py

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'tutorial',
        'USER': 'postgres',
        'PASSWORD': '',
        'HOST': 'localhost',
        'PORT': '5432',
        'CONN_MAX_AGE': 10,
    }
}

As I navigate to links in my website, a new connection is created. For example, upon entering < domain.com >, a new connection is created:

2018-08-10 06:22:15.301 CDT [3380] LOG:  connection received: host=::1 port=56368
2018-08-10 06:22:15.306 CDT [3380] LOG:  connection authorized: user=postgres database=tutorial

And upon navigating to one of the links, like < domain.com/some_page/ >, another new connection is created.

2018-08-10 06:20:10.095 CDT [22932] LOG:  connection received: host=::1 port=56181
2018-08-10 06:20:10.098 CDT [22932] LOG:  connection authorized: user=postgres database=tutorial

When I have visited 10 different link within my domain and visit my 11th link, it finally reaches the maximum available connections, and disconnects the very first connection I established by visiting < domain.com >:

2018-08-10 06:30:17.715 CDT [6884] LOG:  disconnection: session time: 0:00:09.011 user=postgres database=tutorial host=::1 port=56368

Please note that port=56368 was the exact same port I opened upon visiting my < domain.com > the first time. Apparently a new connection is established every time I visit a new link, and if the current number of connections exceeds the max connections, the very first connection is disconnected in order to accept a new connection.

But this is not I want. I don't want a new connection to be created every time a user visits a link inside my domain. I want to use only one connection throughout my entire domain per user. If a user opens a new tab, then I might want to establish a new connection, but not sure if this is the right way to do it.

How can I achieve this? Ideally I would want to use connection pooling, but I don't really know how to implement it inside Django. I know how to establish connection pooling system using a pure psycopg2 , but not sure if I want to do it that way, since Django might support such functionality. Or should I just write separate psycopg2 codes for connection pooling?

Edit

I'm aware that CONN_MAX_AGE specifies number of seconds that a request can be alive. But, the connection I used to load a page does not close after 10 seconds it was loaded. But instead, its behaving as if CONN_MAX_AGE is setting the maximum number of connections, and I do not know why. The log file outputs disconnection: message only if the number of connections exceeds CONN_MAX_AGE . IT DOES NOT outputs disconnection message after 10 seconds a page is loaded.

I'm using Django 2.0.6 , psycopg2 2.7.5 , postgreSQL 10

Answer 1

'CONN_MAX_AGE' is the number of seconds your connection keeps alive. Try removing that parameter from your db settings.

Django inherently does not support connection pooling. You can try take a connection from the pool and close a connection. But this is not actual connection pooling.