Hi Richard Thanks for the explanation. But what makes "keep" option more beneficial or more efficient ? what do you use normally? Regards Vidya Richard Foote wrote: >Hi Vidya, > >"deallocate unused" will only deallocate extents up to the size specified by >your initial/minexents storage allocation. > >"deallocate unused keep blah" allows you to go below your initial allocation >although it won't violate uniform extent size (LMT), minimum extent size >(DMT), etc. limitations. > >Cheers > >Richard >----- Original Message ----- >From: "vidya kalyanaraman" <vidya.kalyanaraman@xxxxxxxxxx> >To: <oracle-l@xxxxxxxxxxxxx> >Sent: Thursday, February 19, 2004 10:22 PM >Subject: Deallocate Unused > > >Hi >While alterering the table to deallocate the extents which are above the >HWM, we did use the following command. >alter table <tab> deallocate unused; > Another DBA here feels that appending the DDL with "KEEP' keyword >is more beneficial. But he could not give any solid reason for doing so. >alter table <tab> deallocate unused keep 10M; >Can any one tell me how these two commands are different and which is >more efficient? >Scanned through Metalink, but could not find the correct answer for this >question. >Thanks in Advance >Vidya > > > >---------------------------------------------------------------- >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 -----------------------------------------------------------------