RE: Mismatch between v$filestat and v$sysstat

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_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Allen, Brandon Sent: Monday, October 31, 2005 10:48 AM
To: oracle-l_at_freelists.org
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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