Re: DB2 - Default Extent Size - Impact on table size and performance

Hi Gopal

It is recommended to keep the default extent size as 2 when SAP application is running on DB2.

Basically this can be changed when you create new table space and mention explicitly a different default extent size ( using the EXTENTSIZE option ) .

However in the case of running of SAP , the tablespaces are created in the installation phase only and hence they are created with the default extent size. 

I think the option is present during the SAPINST installation phase to manually create the table spaces.

See slide 25 in the below presentation :

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/5047883b-1784-2c10-bda8-ea498e541dc1?QuickLink=index&…

Also the extent size is defined at a table space level .

Please see the following link - should be helpful :

Table Spaces :: Chapter 1. Data Storage :: Advanced DBA Certification Guide and Reference :: Certification :: eTutorials…

Thanks

Rishi