John
All the tablespaces are on different disks - Sorry I should have mentioned
this in the original post itself...
Babu
John Kanagaraj
<john.kanagaraj@h To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
ds.com> cc:
Sent by: Subject: RE: direct path read waits
[EMAIL PROTECTED]
02/20/03 03:11 PM
Please respond to
ORACLE-L
Your answer was buried in the question itself. If the TEMP tablespace had
to
contend with Tablespace C on the same 'disk' then such a result is
expected.
John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002
What would you see if you were allowed to look back at your life at the end
of your journey in this earth?
** The opinions and statements above are entirely my own and not those of
my
employer or clients **
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, February 20, 2003 11:41 AM
> To: Multiple recipients of list ORACLE-L
> Subject: direct path read waits
>
>
> All
>
> We are doing some performance testing while moving from one server to
> another. I was trying to time some index rebuilds and noticed
> something
> that I cant explain.
>
> I am rebuilding an index on a 1 million row table. Lets say its on
> tablespace A and when I rebuild it to tablespace B it does in
> 33 seconds. I
> put it back on A and then rebuild it on tablespace C it takes 1 min 40
> seconds. The only change here is the target tablespace.
>
> When I set 10046 level 12 and counted time waited (ela column)
>
> From A - B (33 seconds)
>
> sum of elapsed in "DIRECT PATH READ" = 394 ( i think this is cs)
>
> From A - C (1 min 40 sec)
>
> sum of elapsed in "DIRECT PATH READ" = 6251
>
> The P1 of all of these waits point to the same file (#4 part of TEMP
> tablespace)
>
> Why should the change in the target tablespace affect the
> time taken to
> read from the TEMP tablespace?
>
> TIA
>
> Babu
>
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