RE: Performance tuning

It is a requirement for any application-based replication package, even the
ones that claim not to use journals. Reason: any abnormal start will use
the journals to recover the system to a known point. Happens under the
covers and you don't have to do much except watch.

PowerHA is not application based but it still uses journaling in the startup
of the partitions.

That particular LPP is not awful in price and has a definitive effect on the
performance of journaling.

We include it in most every upgrade if we can. The other one we like to
include is DB2 Symmetric Multiprocessing (option 26 of 5770SS1) when there
are more than two cores on the system. That's another LPP that really helps
when utilized properly.


--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> On Behalf Of Rob Berendt
Sent: Monday, December 03, 2018 7:53 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: Performance tuning

Joe,

Infor LX (and/or BPCS) and Mimix? HA Journal Performance should be a
REQUIREMENT!!!!!
We've run time trials before and after. Freaking huge difference!!!!

Resource
ID Option Feature Description
5770SS1 42 5117 HA Journal Performance

Note: If you're one of those fools who load all LPP's on figuring you'll
stay current with PTFs this way and you can just start paying for it when
you need it then you have already burned through your 70 day trial period.
If you didn't, then you can load it up and give it a try.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Date: 12/02/2018 01:06 PM
Subject: Re: Performance tuning
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Yes, we've already gone to SSD, Rob, so that particular ship has already
sailed. :) However, I am unfamiliar with HA Journal Performance. We
use MIMIX; I wonder if this is something I should be looking into.
Heck, for all I know we already have it, but it definitely sounds like
something I should look into.

On 11/30/2018 12:31 PM, Rob Berendt wrote:

Sometimes throwing money at hardware isn't always the answer. Our
original foray into SSD's was a big disappointment. Much less money for

a

much larger return on investment would have been to buy the "HA Journal
Performance" option as part of SS1. I daresay it will be a rare
consultant who can pinpoint WHY you might need that and predict how much
it will help.


Rob Berendt