Rishi, The algorithm for has partitioning in Oracle requires you to choose your partition count as a power of 2 (i.e. 2, 4, 8, 16, 32 partitions, etc) any other number will be unbalanced as you've seen.
Cheers, Pete -- Peter Moore Systems DBA, Mid-Range Centre of Expertise, Global Service Delivery, SchlumbergerSema, Reading Phone: 0118 963 6827 Email: [EMAIL PROTECTED] > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] > Sent: 19 November 2002 19:39 > To: Multiple recipients of list ORACLE-L > Subject: Partitioning > > > We have a table with around 80 million rows. The table has > been partitioned > by hash as there is no clear way of partitioning depending on > range etc.. > The data is very unevenly distributed in these partitions. > Some of them even > have 3 times the number of rows as compared to the other partitions. > This application is being ported from Informix to Oracle (9i R2). In > informix the dba's had partitioned the table based on a > function . He was > taking the mod of the number ( dividing by 10 ) . The values were then > placed in either of the 10 partitions ranging from 0 - 9. > This really gave > us very good distribution of data .Can we achieve something > similar in 9i > with list partitioning. > > > TIA > > Rishi > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > _________________________________________________________ This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of SchlumbergerSema. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please notify the SchlumbergerSema Helpdesk by telephone on +44 (0) 121 627 5600. _________________________________________________________ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: MOORE, Peter Rbh INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
