Re: How to caliculate the IO Demand for IOPS and ThroughtPut

From: K Gopalakrishnan <kaygopal_at_gmail.com>
Date: Mon, 20 Jun 2011 13:14:03 -0500
Message-ID: <BANLkTik5pcqKOaLy2MWLjVQWvcUy6JBHFw_at_mail.gmail.com>

Andrew-et all,

You might see inflated IOPS when you use 'physical reads' or 'physical writes' in the equation. The metric 'physical reads' records the number of block requests and a block requests will always be higher than IO requests. Use 'physical read/write IO requests' while calculating disk IOPS.

Also disk IOPS might be significantly higher than the database IOPS when you add the RAID/parity overheads.

-Gopal

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http://www.freelists.org/webpage/oracle-l Received on Mon Jun 20 2011 - 13:14:03 CDT

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