RE: Mismatch between v$filestat and v$sysstat
- From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 31 Oct 2005 10:56:25 -0700
My apologies for not searching Metalink thoroughly prior to posting. I did a
cursory search before posting, but just searched again and found the following
explanation:
"The 'physical reads' statistic (from v$sysstat) reflects the number of blocks
read from the OS, not the number of I/O's. The Tablespace IO section is
obtained from the v$filestat view which reflects the number of I/O's, not the
number of blocks returned."
I wasn't aware that 'physical reads' from v$sysstat reflected the # of blocks
rather than # of reads. Seems like the stat name is a bit misleading then. It
should be 'physical blocks read' if you ask me.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Allen, Brandon
Sent: Monday, October 31, 2005 10:48 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Mismatch between v$filestat and v$sysstat
Why doesn't sum(phyrds) from v$filestat match 'physical reads' from v$sysstat?
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