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IDS Forum

FW: FW: Data Loads taking lots of extra time

Posted By: Knox, Ernest
Date: Friday, 15 April 2011, at 1:18 p.m.

In Response To: FW: Data Loads taking lots of extra time (Knox, Ernest)

Just to follow-up on this discussion. I had the customer to set the
pdqpriority to 25 for starters and the loads were much faster. I'm
waiting to hear from him for the week and will let you know. I asked
him to increase the quantity over time to a comfortable amount less than
100.

Thanks for everyone's suggestions,

*******************************************************************

Ernie Knox

IT Database Administrator Specialist

Sears Holdings - BU: I & T Group

3333 Beverly Rd., B4-266A

Hoffman Estates, IL. 60179

Office: (847) 286-5735

Email: Ernest.Knox@searshc.com

Blackberry: 2244650553@messaging.sprintpcs.com
<mailto:2244650553@messaging.sprintpcs.com>

Page via Skytel: 2244650553@sprint.skytel.com
<mailto:2244650553@sprint.skytel.com>

Informix or MySQL Primary: 9110210@skytel.com
<mailto:9110210@skytel.com>

Informix or MySQL Secondary: 7276872@skytel.com
<mailto:7276872@skytel.com>

" Yes we can make a Change! "

" It's always a great day to watch Sports - GO LIONS, TIGERS, and BEARS!
"

" Lets not forget - GO Pistons and Red Wings! "

GSU

*******************************************************************

-----Original Message-----
From: Swanson, Donald
Sent: Thursday, April 07, 2011 9:20 AM
To: Knox, Ernest
Subject: RE: FW: Data Loads taking lots of extra time [23287]

Hi Ernie,

I will ask wintel to check the controller cache.

Without the controller cache being checked, I set pdqpriority.
Yesterday's load took 9 minutes, and todays took 35.

Did we just get lucky or did pdqpriority help?

First log is without pdqpriority on 4/5.

Execution Started: 4/5/2011 9:40:0
Adding asccoachdetail data from dailySalesAssocAndLoc.txt

Database selected.
128126 row(s) loaded.
Database closed.

Execution Complete: 4/5/2011 11:15:24

Execution Started: 4/6/2011 5:35:1
Adding asccoachdetail data from dailySalesAssocAndLoc.txt

Database selected.
PDQ Priority set.
148050 row(s) loaded.
Database closed.

Execution Complete: 4/6/2011 5:44:29

Execution Started: 4/7/2011 5:30:0
Adding asccoachdetail data from dailySalesAssocAndLoc.txt

Database selected.
PDQ Priority set.
162444 row(s) loaded.
Database closed.

Execution Complete: 4/7/2011 6:4:17

Don Swanson

From: Bogdan BOTEZ [mailto:bmbogdan@gmail.com]

Sent: Wednesday, April 06, 2011 03:17 AM

To: Knox, Ernest

Subject: Re: FW: Data Loads taking lots of extra time [23287]

I had more than once the experience of failed/depleted battery
for the

controller cache where the drivers will disable the cache
resulting in

an 5x-6x-... performance deterioration.

Did you checked if the basic/direct IO (without Informix) didn't
degraded?

On unix land you can do this using dd, on windows there must be

utilities that will do the same (just not delivered with the
OS).

Regards,

Bogdan BOTEZ.

On Fri, Apr 1, 2011 at 14:55, Knox, Ernest
<Ernest.Knox@searshc.com> wrote:

IDS 9.40.TC1

OS: Win 2000 SP4

Intel(r) XEON(tm) MP CPU 1.90GHz AT/AT COMPATIBLE 3,669,424 KB
RAM

=20

Questions:

=20

1. I did see other processes running at the same time, which
could

be utilizing internal disk controller. Should I look at
something else?

2. Should I let the customer use a different load method?

3. Would a newer version perform faster (11.7)?

=20

Problem:

=20

>From my Customer:

=20

"Sent: Thu 3/31/2011 9:37 AM

=20

After March 15, our loads to the asc_coach_detail table has
increased

from loading in 20-45 minutes to 3-5 hours. The amount of data
rows has

not increased dramatically, to support the delay.

Can you check to see if there has been some change that has
facilitated

this delay in loading? I am copying the wintel team as well in
case they

are aware of any changes to the servers listed below."

=20

My initial response to the Customer and his reply:

=20

Sent: Thursday, March 31, 2011 5:13 PM

I really don't see much of an informix issue.

=20

1. When (time) are you performing these loads? Normally between
5:30 and

6:30 Central. Sometimes after 7am.

2. Are the loads being performed during OLTP times? We are data
loading

into a reporting database. This database has no OLTP

3. How many rows are you loading between commits? Mary might
know. She

did analysis in the Fall when we had a similar issue.=20=20

4. You have 9 indexes to also insert into, which can take time.
Yes, but

until 3/15, load time was <1 hour. After 3/15, consistently >3
hours=20

5. You may want to upgrade to new version of informix 11.5+
Bring it

on. We have it in dev, but no time to test it. Joel????

6. Things seem to be running fast right now. Our load completed
at

9:46.=20

7. Are you using load, DBload, HPL, or what to load the data?
DBLOAD

because of the volume of data.=20

8. How many rows are you loading at each time? 200-300k rows. We
loaded

550k (month end data) rows on 2/27 in less than an hour.=20

9. How many of these loads are running each day? only 3 or 4
loads use

dbload. We have several (maybe 50 per day) loads using an odbc

connection. When I sent the email this morning, the

asc_coach_detail dbload was the only hit on the database.

=20

Thanks,

*******************************************************************

Ernie Knox

IT Database Administrator Specialist

Sears Holdings - BU: I & T Group

3333 Beverly Rd., B4-266A

Hoffman Estates, IL. 60179

Office: (847) 286-5735 <tel:%28847%29%20286-5735>

Email: Ernest.Knox@searshc.com

Blackberry: 2244650553@messaging.sprintpcs.com

<mailto:2244650553@messaging.sprintpcs.com>=20

Page via Skytel: 2244650553@sprint.skytel.com

<mailto:2244650553@sprint.skytel.com>=20

Informix or MySQL Primary: 9110210@skytel.com

<mailto:9110210@skytel.com>=20

Informix or MySQL Secondary: 7276872@skytel.com

<mailto:7276872@skytel.com>=20

=20

" Yes we can make a Change! "

" It's always a great day to watch Sports - GO LIONS, TIGERS,
and BEARS!

"

" Lets not forget - GO Pistons and Red Wings! "

GSU

*******************************************************************

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Sears Holdings =

Corporation and/or one of its subsidiaries. It is confidential
and may cont=

ain proprietary or legally privileged information. If you are
not the inten=

ded recipient, please delete it without reading the contents.
Thank you.

************************************************************************
*******

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