Re: Re: Can Bind variables be an issue with respect to network transfer?

Nenad,

That's a TIL for me. Never thought of it before. Thanks.

Jonathan Lewis

On Wed, 14 Oct 2020 at 15:05, Noveljic Nenad <nenad.noveljic_at_vontobel.com> wrote:

> “An IN list is limited to 1,000”
>
>
>
> Unless it’s a multi-value IN list, which is limited to 1e5 elements.
>
>
>
> Best regards,
>
>
>
> Nenad
>
>
>
> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
> Behalf Of *Jonathan Lewis
> *Sent:* Mittwoch, 14. Oktober 2020 16:00
> *To:* Oracle L <oracle-l_at_freelists.org>
> *Subject:* Re: Re: Can Bind variables be an issue with respect to network
> transfer?
>
>
>
> Lothar,
>
>
>
> Comparing the ela for the "PGA allocate memory" with the matching "tim=" I
> think what you're seeing is the time it takes Oracle to build an array and
> copy data from the SQL*Net packet to the array. Obviously some of the
> difference is about the time to write to the trace file, even so there's a
> lot of other CPU to account for.and it's happening between the memory
> allocations. I doubt if "traffic" (i.e. movement across the network) is
> relevant - the ns calls are probably a layer above that moving the data
> between the sql*net layer and the session layer.
>
>
>
> I am curious about the internal_function() and 4,700 variables. An IN
> list is limited to 1,000 and I wouldn't have expected an OR of IN lists to
> turn into a single internal_function(), Perhaps there's something about
> data types and character set conversion (or some other conversion) that's
> adding to the CPU time.
>
>
>
> Regards
>
> Jonathan Lewis
>
>
>
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