Re: sql developer daily ash statistics chart query
- From: Martin Berger <martin.a.berger@xxxxxxxxx>
- To: exriscer@xxxxxxxxx
- Date: Wed, 9 Nov 2011 07:06:47 +0100
I'd say it is " 1/10 of an hour"
=> 360 sec -> 6 min
I've not checked the Report right now - is it dividing an hour into 10 parts?
that's my guess,
Martin
On Wed, Nov 9, 2011 at 01:01, LS Cheng <exriscer@xxxxxxxxx> wrote:
> Hi
> In SQL Developer there are few AWR/ASH report available, one of them is
> daily ash statistics chart and made up by following query
>
> select to_char(trunc((sample_time),'HH'),'HH24:MI'), state, count(*)/360
> from
> (select sample_time, sample_id
> , CASE WHEN session_state = 'ON CPU' THEN 'CPU'
> WHEN session_state = 'WAITING' AND wait_class IN ('User I/O')
> THEN 'IO'
> WHEN session_state = 'WAITING' AND wait_class IN ('Cluster')
> THEN 'CLUSTER'
> ELSE 'WAIT' END state
> from DBA_HIST_ACTIVE_SESS_HISTORY
> where session_type IN ( 'FOREGROUND')
> and sample_time between trunc(sysdate,'HH') - 25/24 and
> trunc(sysdate,'HH') - 1/24 )
> group by trunc((sample_time),'HH'), state order by trunc((sample_time),'HH')
>
> Does anyone know why we divide count(*) by 360?
>
> Thanks
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