RE: How much memory is an oracle shadow process using

Thanks for the help Igor but I have managed to work that bit out for myself. I did think that the posting was reasonably comprehensive and I also mentioned what the 2 statistics were used for. Perhaps the only thing I did not mention was that these specific queries are running against an 8.1.7.3 database but I am really looking for a generic answer anyway

John

-----Original Message-----
Sent: 07 October 2002 15:09
To: Multiple recipients of list ORACLE-L

> Does anybody have any other insight as to how what exactly the values in
> statistic# 16 & 21 can be used to indicate overall memory usage by Oracle
> processes

Look them up in V$STATNAME.

Igor Neyman, OCP DBA
ineyman_at_perceptron.com

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Monday, October 07, 2002 9:24 AM

> Thanks for your script. The whole site is an excellent resource.
> Thanks Tim,
>
> I have run your script and also run a query against statistic 15 and 20
from
> v$sessstat
> (max UGA and PGA memory used )
> SQL>
> SQL> select name,statistic#,sum(value/1024/1024) "Curr Mb"
> 2 from v$sesstat a, v$database c
> 3 where statistic# in (16,21)
> 4 group by name,statistic#
> 5 /
>
> NAME STATISTIC# Curr Mb
> --------- ---------- ----------
> SID 16 2.8621788
> SID 21 23.4703255
>
> Running the oramem.sh script I return the following
>
> Total RAM = 16384Mb, Swap = 19779.85Mb used, 2686.51Mb free
>
> Total memory consumption by Oracle instance "SID":
>
> # Procs # Procs Max Sum
> Foregrnd Backgrnd Shm Kb Priv Kb Total Kb
> ======== ======== ====== ======= ========
> 27 16 424600 106144 530744
>
> So oracle shows 26Mb used where using a pmap command returns about 105Mb.
>
> I think I am comparing like with like here but obviously the results don't
> show that
>
> Does anybody have any other insight as to how what exactly the values in
> statistic# 16 & 21 can be used to indicate overall memory usage by Oracle
> processes
>
> Thanks
>
> John
>
>
>
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> INET: John.Hallas_at_vodafone.co.uk
>
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-- 
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-- 
Author: Igor Neyman
  INET: ineyman_at_perceptron.com

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