Oracle-L: RE: direct path read waits

From: John Kanagaraj <john.kanagaraj_at_hds.com>
Date: Thu, 20 Feb 2003 13:45:30 -0800
Message-ID: <F001.0055386A.20030220134530@fatcity.com>

Babu,
You:
> All the tablespaces are on different disks - Sorry I should
> have mentioned
> this in the original post itself...

Me:
> 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.

Note that I enclosed the 'disk' above within quotes. Different filesystems and mount points does not necessarily mean much in these days where a single storage array may be shared among multiple servers. As long as you are not using JBODs, i.e. you are on a SAN/NAS, there is no physical guarantee that the disks are where they purport to be. Can your SA verify that these 'disks' are actually different? A 'sar -d' during that period may reveal some interesting results.

John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002

Disappointment is inevitable, but Discouragement is optional!

The opinions and statements above are entirely my own and not those of my employer or clients ** -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: John Kanagaraj INET: john.kanagaraj_at_hds.com

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