RE: Journaling and Commitment Control

This all reminds me of something I posted in these lists in March, 2010. It refers to a performance PDF by Rick Turner, a performance expert at IBM near the start of this century. Here's a link to the article, it's about batch performance. And it speaks of a technique that gets us some of the benefit of option 42 without, at the time, the cost of it.


https://public.dhe.ibm.com/as400/web/benchmark/batprf.pdf


The Midrange post is here - https://archive.midrange.com/midrange-l/201003/msg00699.html


I see it's in a thread with Rob and Charles Wilt - man, we've been around awhile! And it does mention the HA Journal Performance feature that is no longer any additional cost.


Fun to think of the good, old days!


Cheers
Vern

On Wed, 3 Jan, 2024 at 3:52 PM, Greg Wilburn <gwilburn@xxxxxxxxxxxxxxxxxxxxxxx> wrote:


To: rpg programming on ibm i

Good to know... especially since we already have performance issues (insert eyeroll here).

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx<mailto:rpg400-l-bounces@xxxxxxxxxxxxxxxxxx>> On Behalf Of Rob Berendt
Sent: Thursday, December 28, 2023 3:14 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx<mailto:rpg400-l@xxxxxxxxxxxxxxxxxx>>
Subject: Re: Journaling and Commitment Control

I know - reply to an old thread.
Greg, we are using Infor's LX. It does not come with journaling. Years ago as part of our H/A project we had to turn journaling on. Other than a performance hit no negative ramifications. No program code changes, etc.
We tried throwing money at it by replacing all the spinning disk drives with SSD's and that didn't noticeably help. Then we installed the HA journal performance option. HUGE BENEFIT. It's a must have. Somewhere in the archives I have some before/after times.

On Tue, Dec 5, 2023 at 8:57 AM Greg Wilburn < gwilburn@xxxxxxxxxxxxxxxxxxxxxxx<mailto:gwilburn@xxxxxxxxxxxxxxxxxxxxxxx>> wrote:

Daniel/Charles - thank you very much!

I only have two files in my ERP that show up in the select below.
I will search the CL source code for FRCRATIO override. But In 25
years, I've not seen that anywhere.

FWIW - it is amazing what you find in your current environment when
examining it this closely (during a project).

I'd also like to say just how invaluable the midrange lists are.

Thank you all again!
Greg

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx<mailto:rpg400-l-bounces@xxxxxxxxxxxxxxxxxx>> On Behalf Of
Daniel Gross
Sent: Monday, December 4, 2023 3:36 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx<mailto:rpg400-l@xxxxxxxxxxxxxxxxxx>>
Subject: Re: Journaling and Commitment Control

On Mon, Dec 4, 2023 at 12:21 PM Greg Wilburn <

gwilburn@xxxxxxxxxxxxxxxxxxxxxxx<mailto:gwilburn@xxxxxxxxxxxxxxxxxxxxxxx>> wrote:

I don't know that any of our tables have FRCRATIO(1)... how can I tell?

On 04.12.2023<http://04.12.2023> at 21:27 Charles Wilt <charles.wilt@xxxxxxxxx<mailto:charles.wilt@xxxxxxxxx>> wrote:

DSPFD...

I think it is even easier with SQL:

select * from sysfiles where force_write_ratio = 1 ;

This should give you all files, that are configured with FRCRATIO(1).

Here a the docs:
https://www.ibm.com/docs/en/i/7.5?topic=services-sysfiles-view

HTH
Daniel
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