Rishi, In hash partitioning you have to select the number of partitions equal to the power of 2. i.e. 2,4,8,16 so on. Your problem of skewed partition size is well documented in hash partitioning if you don't choose correct number of partitions. Please refer to JLewis Book. He deals with this very well and from practical stand point.
http://www.amazon.com/exec/obidos/ASIN/0201715848/jlcomp/102-6448893-9036931 Check his site too http://www.jlcomp.demon.co.uk/ HTH Cheers RS P.S.: Listers ...I am back..:) ( I know....I know...you all say who noticed ya gone man..!! ) --- [EMAIL PROTECTED] wrote: > 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). __________________________________________________ Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site http://webhosting.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Sakthi , Raj 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).
