can anyone recommend a good article managing sort_Area_size and
understanding temp tablespace waits?
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
Sent: Thursday, September 18, 2003 6:34 PM
> > I have been doing some alter sessions to improve performance of gigabyte
> sized 'minus' operations. How do I tell if this is helping other than
> completion time?
> >
> > I believe that if LIOs to PIOs ratio improves with the SAME query then
> sort_area_size has helped right?(notice Im not trying to improve my
> cache/hit ratio).
>
> If you see less direct IO waits on your temporary tablespace, then
> increasing s_a_s has helped.
>
> >
> > I get this from v$sess_io.
> >
> > how do I tell how much temp tablespace my session uses? I cant find a
> statistic for it? I see that I used up all my PGA since PGA size and PGA
max
> size are equal in v$sesstat.
>
> select * from v$sort_usage where sid = <sid>;
>
> > anything else I can look at?
>
> Activity on temp tablespace from v$tempstat.. but it's only good enough
for
> comparing with baselines..
>
> Tanel.
>
>
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> Author: Tanel Poder
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>
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Author: Ryan
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Received on Thu Sep 18 2003 - 18:29:45 CDT
