- Each time we check if a session is valid we create a new cursor.
This could lead to issues with db_maxconn that limits the number of
connections to the postgresql server.
In a perfect world, a worker should use a single connection to
postgres to process the request.
The only known side effect is that the cursor is created earlier in
the execution of the code.
- This commit fixes issues with the longpolling raising
Psycopg2.PoolError exceptions on databases with a lot of clients.
Christophe Simonis