Re: SQL Block Inserts Performance

I can confirm that the OVRDBF command does work for SQL processes. I've
used it many time to override to a particular member in multi-member
physical files. Unfortunately I don't know if your idea would improve
performance, and I kind of doubt that it would. My gut feel is that IBM
does everything they can think of to improve performance, and they would
have considered it already.


On Fri, Mar 27, 2020 at 10:10 AM Francois Lavoie <
Francois.Lavoie@xxxxxxxxxxxxxxxxxxxx> wrote:

Imho, SQL does not take into account any file overrides
You will need to make the changes on the file itself either by Alter

Table

or CHGPF command



-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Robert
Wenzel
Sent: Friday, March 27, 2020 12:01
To: rpg400-l@xxxxxxxxxxxxxxxxxx
Subject: SQL Block Inserts Performance

Can anyone tell me if issuing an OVRDBF command in a Cl program [to set a
file buffer size larger the default than 4K] before calling an SQLRPGLE
program will improve performance of blocked inserts using SQL Insert
statement? If yes, can you tell me if there is a potential problem if

the

file array is greater than the buffer size (say if I use 256K in the

OVRDBF

statement)?

Thanks for all your assistance. I get so much out of these blogs.

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*Robert Wenzel, Software Engineer*
iSeries Applications Support and Development

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