Re: Fetch speed in SQL Developer

Hi Jeff,

thanks. I already asked to customer to change the fetch size. As reported it did not make much difference. I can see that the app is fetching with array size 25. (Although they pretend it is set to 500.)
Could ODBC play a negative role here?

Thanks

Lothar

On 09.03.2017 16:14, Jeff Smith wrote:
> Let's take a good chunk of the app dealing with the data before doing another fetch bit of the equation.
>
> Instead of using the data grid, run the same query with F5. That way there's no worrying about the grid doing its work to display the data before getting the next batch of data.
>
> Also, what's your SQL Array Fetch size set to in Preferences > Database > Advanced?
>
> 50 won't be very friendly if you're going to grab 100k rows, go up to the max we allow, 200. I'm guessing the grid, ctrl + PgDn will go a bit faster this time.
>
> Jeff
> IT
>
> -----Original Message-----
> From: Lothar Flatz [mailto:l.flatz_at_bluewin.ch]
> Sent: Thursday, March 09, 2017 10:07 AM
> To: Jeff Smith <jeff.d.smith_at_oracle.com>
> Cc: oracle-l_at_freelists.org
> Subject: Fetch speed in SQL Developer
>
> Hi Jeff,
>
> i know an application that fetches 80.000 - 100.000 rows. (Yeah, that does not make sense, it is OLTP).
> SQL trace show that the db is waiting on sql net message from client between fetches.
> (Don't anybody tell me that is an idle wait event, it is not in this
> case.) I suspect that the application is processing the rows and the db is waiting for it.
> Now the application vendor has told my customer to fetch 100.000 rows in sql developer as for a test and indeed my client is waiting around 20 seconds, fetching all rows using cntrl + PageDown.
> This seems actually too long. However I am not sure if that is a valid test for the network transfer rate or SQL Developer is taking a time toll fetching the rows.
> Therefore I am asking. Tests on my laptop suggest it is really the network transfer that takes the time.
> Since this is a question that might concern others as well I included the list.
>
> Regards
>
> Lothar
>
>
>
>

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