Re: SELECT slows down on sixth execution

2015-10-17 15:29 GMT+02:00 Yves Dorfsman <yves(at)zioup(dot)com>:

> On 2015-10-14 03:00, Albe Laurenz wrote:
> >
> > You are encountering "custom plans", introduced in 9.2.
> >
> > When a statement with parameters is executed, PostgreSQL will not only
> generate
> > a generic plan, but for the first 5 executions it will substitute the
> arguments
> > and generate and execute a custom plan for that.
>
> Wow! Thanks. I feel this should be documented a bit better.
>
> Shouldn't this be explained in at least as much details as in your
> explanation, in the sql-prepare document?
>

probably - some section about benefits and risks can be useful - but it is
task for somebody with better English than is mine :)

Regards

Pavel

>
> Yves.
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