On Monday 18 March 2013 16:36:53 Aymeric Augustin wrote:
> By default, the development server creates a new thread for each request it
> handles. Not only does this negate the effect of persistent connections
> (they're thread-local), 
> [...]

> 1) Do we want to enable persistent connections in production by default?
> 
> 2) Assuming the answer to 1) is yes, can we fix runserver?
>       a) close connections at the end of the dev server request handler
>               => creates tight coupling between the dev server and the ORM :(
>       b) disable persistent connections when DEBUG  = True
>               => badly targeted: some people may use runserver with DEBUG = 
> False,
>               or want persistent connections when DEBUG = True 
>       c) ???
> 

If the persistent connections are thread-local, don't you want to close them 
anyway when the thread exits?

> Florian independently discovered the same problem with gunicorn + gevent,
> because the gevent worker runs each request in its own "thread"
> (greenlet).

... but that fix will kill persistent connections under gunicorn.

The solution that sounds "right" is to pool the persistent connections -- 
every thread that ends returns the connection to the pool.

If I understand correctly, this would tie the ORM not to the dev server, but 
to the wsgi handler -- but in a sense where, actually, it should be tied.

Shai.

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