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Home -> Community -> Mailing Lists -> Oracle-L -> Re: data files the busiest
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_at_lyco To: Multiple recipients of list ORACLE-L
<ORACLE-L_at_fatcity.com>
s.com> cc:
Sent by: Subject: Re: data files the busiest
root_at_fatcity.c
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:Received on Wed Jul 25 2001 - 11:33:14 CDT
>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" <ORACLE-L_at_fatcity.com>
>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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>> Please see the official ORACLE-L FAQ: http://www.orafaq.com
>> --
>> Author: Viraj Luthra
>> INET: viraj999_at_lycos.com
>>
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Get 250 color business cards for FREE! http://businesscards.lycos.com/vp/fastpath/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Viraj Luthra INET: viraj999_at_lycos.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: Jared.Still_at_radisys.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
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