Dennis, Both. I am testing a insert performance on Oracle database where I am selecting from a 1M table 1000 rows at a time and inserting into big table having 200M records and 4 big indexes. So just wondering if different block sizes can help read ahead etc ...currently database block size is 8k. Any article on db_block_size will be greatly help?=20 (Already searched on google but still looking for specific article references from experts) Thanks --Harvinder -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of DENNIS WILLIAMS Sent: Sunday, June 20, 2004 10:06 PM To: 'oracle-l@xxxxxxxxxxxxx' Subject: RE: db block size Harvinder Are you asking how to choose a block size? Or are you intending to have a different block size for each type of tablespace? Dennis Williams DBA Lifetouch, Inc. dwilliams@xxxxxxxxxxxxx=20 -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Harvinder Singh Sent: Sunday, June 20, 2004 7:06 PM To: oracle-l@xxxxxxxxxxxxx Subject: db block size Hi, It will be great if u can point me to some white papers/articles =3D explaining how to choose the database block size for different kind of = =3D tablespaces : index ,data ,temp, undo etc... Env: 10g on WIN2K Thanks --Harvinder =3D20 =3D20 =3D20 ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html ----------------------------------------------------------------- ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------