Tracking Processes

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Tracking Processes

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Ten Centuries

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September 20, 2012 at 9:04 pm

#393225

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Naseer Ahmad
SQL Server DBA
September 21, 2012 at 3:14 am

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Lokesh Vij SSChampion Points: 10836 More actions · Answer 1

Thanks Naseer...a very easy question to conclude this week 🙂

~ Lokesh Vij

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rVadim Hall of Fame Points: 3969 More actions · Answer 2

I answered "Non of the above". I thought DiskIO in sp_Who2 means reads and writes combined, not just reads as question asks. Am I wrong?

--Vadim R.

fred koene Say Hey Kid Points: 707 More actions · Answer 3

I thought the same, none of the above. Also thinking that Disk IO is a combination of reads and writes, which makes it unclear how many of them were reads.

vk-kirov SSCertifiable Points: 7686 More actions · Answer 4

rVadim (9/20/2012)
I thought DiskIO in sp_Who2 means reads and writes combined, not just reads as question asks. Am I wrong?

You are absolutely right. Running 'sp_helptext sp_who2', we can see the following:

-------------------- Capture consistent sysprocesses. -------------------

select

spid

...

,physical_io

...

into #tb1_sysprocesses

from master.dbo.sysprocesses with (nolock)

--------Output the report.

SELECT

SPID = convert(char(5),spid)

...

,DiskIO = substring(convert(varchar,physical_io),1,@charMaxLenDiskIO)

...

from

#tb1_sysprocesses

where

...

According to BOL (http://msdn.microsoft.com/en-us/library/ms179881.aspx), the column 'physical_io' in sys.sysprocesses contains 'Cumulative disk reads and writes for the process'. So the correct question is indeed 'None of the above' (although I'd 'guessed' the author's thoughts and answered 'sp_who2' :hehe: )

Raghavendra Mudugal SSChampion Points: 10658 More actions · Answer 5

rVadim (9/20/2012)
I answered "Non of the above". I thought DiskIO in sp_Who2 means reads and writes combined, not just reads as question asks. Am I wrong?

+1

(I got the answer right :blush:, but it is wrong... so all wrongs are rights and all rights who thought it was right is wrong)

ww; Raghu
--
The first and the hardest SQL statement I have wrote- "select * from customers" - and I was happy and felt smart.

Raghavendra Mudugal SSChampion Points: 10658 More actions · Answer 6

vk-kirov (9/21/2012)
...
(although I'd 'guessed' the author's thoughts and answered 'sp_who2' :hehe: )

OR probably author can edit the question and add" and writes" in the appropriate place. (only if this is true consideration for him... OR the answer needs to be corrected.)

ww; Raghu
--
The first and the hardest SQL statement I have wrote- "select * from customers" - and I was happy and felt smart.

Carlo Romagnano SSC-Insane Points: 22680 More actions · Answer 7

I get it right, but

rVadim (9/20/2012)
DiskIO in sp_Who2 means reads and writes combined, not just reads as question asks.

+1

paul.knibbs SSCoach Points: 15320 More actions · Answer 8

I'm another who answered "None of the above" because the disk IO in sp_who2 is both reads and writes, not just reads--it's the sort of trick answer that a lot of questions on this website would have used.

Divine Flame SSCoach Points: 15943 More actions · Answer 9

I thought I guessed correctly what Naseer was trying to ask. So, one easy point for me to end the week 🙂 Thanks.

Sujeet Singh

Stuart Davies SSCoach Points: 19505 More actions · Answer 10

Miss read the question so got it right.

Should I be happy about this - not sure

-------------------------------Posting Data Etiquette - Jeff Moden [/url]Smart way to ask a question
There are naive questions, tedious questions, ill-phrased questions, questions put after inadequate self-criticism. But every question is a cry to understand (the world). There is no such thing as a dumb question. ― Carl Sagan
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Koen Verbeeck SSC Guru Points: 259115 More actions · Answer 11

Nice question to end the week, thanks.

Need an answer? No, you need a question
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derek.colley SSCrazy Eights Points: 8040 More actions · Answer 12

A poor question. I answered none of the above simply because DiskIO was a combined figure and the question specifically referenced reads, so my answer is correct.

Also on a formatting point, no 'A', 'B' or 'C' was defined, nor was this question constrained to particular versions of SQL Server, nor indeed is sp_who2 actually a supported stored procedure.

---

Note to developers:
CAST(SUBSTRING(CAST(FLOOR(NULLIF(ISNULL(COALESCE(1,NULL),NULL),NULL)) AS CHAR(1)),1,1) AS INT) == 1
So why complicate your code AND MAKE MY JOB HARDER??!:crazy:

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Victor Kirkpatrick Hall of Fame Points: 3672 More actions · Answer 13

Love answering a question correctly and getting it wrong. Either correct the question and say total IO and not "reads", or correct the answer.