The fact that you see the same busy file from your script as
Jon's script shows is merely coincidence.
Consider the output with varying levels of read and write activity.
Jon's approach is more correct.
Jared
"Viraj Luthra"
<viraj999@lyco To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED]>
s.com> cc:
Sent by: Subject: Re: data files the busiest
[EMAIL PROTECTED]
om
07/24/01 08:25
PM
Please respond
to ORACLE-L
Jon,
well your script also gives me the same busy file. and I am showing the
physical reads also, see my script below. I can see from my script, the
same busy data file as I see from yours, it is just that I have to compare
the 2 figures, that is f.phyrds, f.phywrts. From my script I get :-
/u01/app/oracle/product/8.1.5/dbs/oradata/orcl815/users01.dbf
995671 14940
/u01/app/oracle/product/8.1.5/dbs/oradata/orcl815/system01.dbf
116510 271329
which shows the order of busy from least to the max. and the difference
between the 2 f.phyrds, f.phywrts, shows me.
>From your script I get:-
/u01/app/oracle/product/8.1.5/dbs/oradata/orcl815/users01.dbf
1002657 71.61
/u01/app/oracle/product/8.1.5/dbs/oradata/orcl815/system01.dbf
387046 27.64
So I think I am okay then???
rgds,
raja
--
On Tue, 24 Jul 2001 18:20:43
Jon Walthour wrote:
>Raja:
>
>Your query is on the right track, but it only accounts for the physical
>writes, not the physical reads. Try the attached script.
>
>Jon Walthour
>
>----- Original Message -----
>To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
>Sent: Tuesday, July 24, 2001 9:50 PM
>
>
>> Hello all,
>>
>> If I want to know which data files are the busiest, can I assume that
from
>the following query:-
>>
>> SELECT SUBSTR(name, 1, 128), f.phyrds, f.phywrts
>> FROM v$datafile d, v$filestat f
>> WHERE f.file# = d.file#
>> ORDER BY phywrts
>>
>> If there is vast difference between the physical reads and physical
>writes, then that particular data file would be the busiest? Is this true?
>>
>> rgds,
>>
>> raja
>>
>>
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