Commitment Control Overhead

["Karen Bellecci" <KBellecci@xxxxxxxxxxxxxxxx>]

Can someone steer me in the direction of statistics about using Commitment 
Control.  I have only found the Advanced Backup and Recovery text talking about 
CC, so far.

It looks like there will be at least two added disk I-Os for journaling the 
before and after images of each record; two added disk I-Os for journaling the 
start and end commitment boundary for each logical unit of work (LUW).  If I 
use OMTJRNE on my journal definition, I may avoid the writing of journal 
entries for the history of LUW resources and save on those I-Os.

So, for example, if I have two write statements in my LUW, I increase the disk 
I-Os by 4 + 2, or 3 times as many disk I-Os as without CC.

What other things do I need to factor in?   Is something published on this?

Thanks.  Karen Bellecci
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