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Date: Sat, 10 Sep 2011 12:25:07 +0800
Message-ID: <CAMNBsZv2yajUa_vYjsR_gnaEDCSqxEZB99kqVShOvvzywBOAmw@mail.gmail.com>
Subject: Re: AWR reports question
From: Hemant K Chitale <hemantkchitale@gmail.com>
To: JC1706@att.com
Cc: "oracle-l@freelists.org" <oracle-l@freelists.org>
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No, "block changes"  does not include redo.  The volume of redo is
identified from 'redo size' and  'redo writes'.  "block changes" is only
about database block changes -- the number of block changes.
Of course, an update to a database block also generates redo -- but the
volume of redo is better identified by 'redo size' which is in bytes.
Hemant K Chitale

On Sat, Sep 10, 2011 at 6:01 AM, CRISLER, JON A <JC1706@att.com> wrote:

> Given the following snippit from a 11gR1 db, the line "Block changes"- does
> that include redo as well ?
>
>
> Cache Sizes                       Begin        End
> ~~~~~~~~~~~                  ---------- ----------
>               Buffer Cache:   126,976M   126,976M  Std Block Size:
> 8K
>           Shared Pool Size:    23,040M    23,040M      Log Buffer:
> 138,300K
>
> Load Profile              Per Second    Per Transaction   Per Exec   Per
> Call
> ~~~~~~~~~~~~         ---------------    --------------- ----------
> ----------
>      DB Time(s):                9.1                0.4       0.01
> 0.00
>       DB CPU(s):                0.7                0.0       0.00
> 0.00
>       Redo size:          294,701.7           13,914.8
>   Logical reads:           43,820.4            2,069.1
> *  Block changes:            1,829.8               86.4
>  Physical reads:               46.2                2.2
>  Physical writes:              114.7                5.4
>      User calls:            2,585.1              122.1
>          Parses:              519.3               24.5
>     Hard parses:               13.8                0.7
> W/A MB processed:       25,411,313.0        1,199,836.5
>          Logons:                1.1                0.1
>        Executes:            1,627.6               76.9
>       Rollbacks:                1.8                0.1
>    Transactions:               21.2
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>


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