On Sunday, 26 May 2013 01:34:40 UTC-5, Saba wrote:
>
>
> Hi,
>
> I have a question please regarding db connections and connection pooling
> in web2py.
>
> In models/db.py, I have a connect string like this:
>
> db=DAL('mysql...',pool_size=5)
>
> does model files get executed for every request?
>
yes
> If so, then does it create the above db connection for every request?
>
No. when the request is completed the connection is put in a pool and the
next request pulls it from the pool. If you have more concurrent requests
than the pool size then a new connection is created. Pool size starts at
zero and grows up to the pool size you have declared (5) than stay fixed.
>
> For eg, if there are 10 requests, does it create 50 separate db
> connections ( 10 requests * 5 pool_size)?
>
No. If you have 10 requests but not concurrent, it creates only 1
connection in total. If you have 10 concurrent requests, it creates 10
connections (one each) but when complete will close 5 and recycle 5 for
future use.
>
> Please let me know. Appreciate your response.
>
> thanks,
> Saba
>
>
>
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