Comments on: AAS on AWR

By: João

João — Tue, 06 Aug 2013 13:49:08 +0000

Kyle, I needed to put zero as DECODE default value:

Before:
…sum(decode(session_type,’BACKGROUND’,decode(session_state,’WAITING’,10,0)))…
…’direct path write temp’,10, 0))) IO…

After:
…sum(decode(session_type,’BACKGROUND’,decode(session_state,’WAITING’,10,0),0))…
…’direct path write temp’,10, 0),0)) IO…

My result changed from:

TM AAS CPU IO WAIT
29/07/13 13:42:00 2 0,2 0,8 null

To:
29/07/13 13:42:00 2 0,2 0,8 1

Thanks

By: http://dboptimizer.com/tools-2/ | xfang

http://dboptimizer.com/tools-2/ | xfang — Fri, 28 Dec 2012 14:28:46 +0000

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By: João

João — Tue, 02 Oct 2012 12:01:09 +0000

Kyle, I (think) know why I found strangers results…
I put these values: v_days=1 and v_secs=1

Seems that the query is returning some samples from both sources.
If I change v_secs with any value greater than 1 then results are correct.
Thanks again.

By: Kyle Hailey

Kyle Hailey — Fri, 28 Sep 2012 19:13:37 +0000

@João DBA_HIST_ACTIVE_SESS_HISTORY has 1 in 10 samples, so every sample found is equivalent to 10 samples in v$active_session_history

By: João

João — Fri, 28 Sep 2012 18:07:06 +0000

Hi Kyle, your blog is great.
I have a doubt, in the first SQL
“sum(decode(session_state,’ON CPU’ ,10,0))”
Should not be “sum(decode(session_state,’ON CPU’ ,1,0))” ?

If I am wrong, why did you use 10?

Thanks

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