The dba_space package has routines that will tell you wherer the hwm mark. With that infomration and 1.75 you can get a cup of coffee :-). Knowing "where" the HWM mark is, is not helpful. The only way to move it, is to truncate the table. I know this is difficult in a 24X7 system but frankly is unavoidable.
BTW, you have a perfect situation for a partitioned table based on months. Then instead of deleting date you can drop the partition. John [EMAIL PROTECTED] wrote: > Ethan > The database is in production and users are accesing 24x7.What will be > best approach to do? > DO u have any scripts how to find HWM? > Thanks > -Seema > > >> From: "Post, Ethan" <[EMAIL PROTECTED]> >> Reply-To: [EMAIL PROTECTED] >> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> >> Subject: RE: SPACE FREE HOW? >> Date: Thu, 17 Jan 2002 14:25:37 -0800 >> >> Deleting records from a table does not free up space in the database. >> Search for high water mark in the concepts manual and you should find an >> explanation of how this works. The statement below only frees up space >> above the high water mark on the table. >> >> You can... >> >> create table foo nologging as (select * from big_table); >> >> truncate table big_table; >> >> insert into big_table (select * from foo); >> >> drop table foo; >> >> >> -Ethan >> >> -----Original Message----- >> Sent: Thursday, January 17, 2002 3:27 PM >> To: Multiple recipients of list ORACLE-L >> >> >> ALTER TABLE table DEALLOCATE UNUSED KEEP integer; >> the keep clause is optional. >> >> -sunil >> >> -----Original Message----- >> Sent: Thursday, January 17, 2002 2:58 PM >> To: Multiple recipients of list ORACLE-L >> >> >> Hi >> I deleted millions of rows from diffrent tables and I have not seen any >> impact on database size.What I have to do to get that free space? >> Is it necessary to shutdown the database? >> Thx >> -Seema >> >> -- >> Please see the official ORACLE-L FAQ: http://www.orafaq.com >> -- >> Author: Post, Ethan >> INET: [EMAIL PROTECTED] >> >> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 >> San Diego, California -- Public Internet access / Mailing Lists >> -------------------------------------------------------------------- >> 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). > > > > > > _________________________________________________________________ > Get your FREE download of MSN Explorer at > http://explorer.msn.com/intl.asp. > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: orantdba INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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).
