Excellent, then from what I gather, as with all other configuration
rules-of-thumb, the answer is "It depends." While the optimal size
depends on anticipated load and average database transaction time, the
optimum connection pool size will usually be smaller than one might
expect. If you take for instance, an app with a  connection pool of
10, it can serve a relatively moderate load (400 concurrent users) I
am basing this on my experience using MySQL which is what I am
developing my web2py apps under.

hth
-- Julio

On Jun 26, 8:54 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
> The only limits are those imposed by the database. They can always be
> changed by editing mysql.conf, postegrsql.conf etc.
> sqlite does not use pooling.
>
> Massimo
>
> On Jun 26, 9:57 am, Speedbird <ju...@techfuel.net> wrote:
>
> > Massimo, is there a limit or a relationship between the database and
> > the number of collection pools to be defined?
>
> > (I am sorry, I am at work currently and do not have access to the
> > source to see how pool_size is implemented)
>
> > Thanks!
>
> > On Jun 25, 4:57 pm, mdipierro <mdipie...@cs.depaul.edu> wrote:
>
> > >    db=SQLDB(....,pool_size=10)
>
> > > will do connection pooling and connections will be reused
>
> > >     db.define_table(....,migrate=False)
>
> > > it will not attempt to create the table if you know it there and you
> > > have not changed it.
>
> > > It will be much faster.
>
> > > Massimo
>
> > > On Jun 25, 6:46 pm, kuba <kubano...@gmail.com> wrote:
>
> > > > Hi guys,
>
> > > > I am total newbie to web2py, and one thing really irritates me.
> > > > As i noticed every time I refresh application in web browser db.py and
> > > > any other file in models dir are executed. In tutorial it states that
> > > > whole db initialization should be specified there and as I understand
> > > > during this proces dafine_table functions connects with database to
> > > > check if the table matches its definition....
>
> > > > This means every time i refresh any page or go to another a connection
> > > > with database is made.
>
> > > > is it really is this way or am i missing something ?
>
> > > > I hope i am wrong :)
>
> > > > Thx for help
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