In many cases you will have to take RB segments offline and drop them, then re-create
------Even in this case you have to coalesce rbs tablespace before recreating rollback segments using that particular tablespace to make all released extents as contigous...Besides it is a good practice to reorg rollback segments.. Regards Rafiq Reply-To: [EMAIL PROTECTED] To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Date: Wed, 13 Feb 2002 08:58:47 -0800 Hi, guys, Just my $0.02, coalescing free space will NEVER eliminate fragmentation. In many cases you will have to take RB segments offline and drop them, then re-create. In the interim period you might want to have a big rollback segment(or a few) in another tablespace. Best, Sergey -----Original Message----- Sent: Wednesday, February 13, 2002 11:03 AM To: Multiple recipients of list ORACLE-L Samir, It is not coalesced automatically at shutdown and startup. It is to be coalesced manually. It applies to any tablespace with pctincrease set as 0(zero). I have no idea of 9i but this is normal behaviour of ver 7.3.4 to 8.1.7... Regards Rafiq Reply-To: [EMAIL PROTECTED] To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Date: Wed, 13 Feb 2002 05:48:28 -0800 Rafiq, Just a small question....r the rollback segment extents in the rollback segment tablespace de-allocated when the database is shut down ?? In that case, does the fragmentation remain when the database is restarted or r the blocks coalesced automatically ?? Regards, Samir Samir Sarkar Oracle DBA - Lennon Team SchlumbergerSema Email : [EMAIL PROTECTED] [EMAIL PROTECTED] Phone : +44 (0) 115 - 957 6217 EPABX : +44 (0) 115 - 957 6418 Ext. 76217 Fax : +44 (0) 115 - 957 6018 -----Original Message----- Sent: 12 February 2002 17:49 To: Multiple recipients of list ORACLE-L Is your tablespace fragmented as it is not finding contingous extent .. TRy to coalesce your subject tablespace and try... you can use following script to check whether coalesing is required or not.. If percent is < 100 then coalesce it.. select substr(tablespace_name,1,10)TS_NAME,total_extents "Total_Extnts",extents_coalesced,round(percent_extents_coalesced,0) from dba_free_space_coalesced order by tablespace_name / HTH Regards Rafiq Reply-To: [EMAIL PROTECTED] To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Date: Tue, 12 Feb 2002 02:33:19 -0800 All, The following is the pitiable scenario I am in and would really appreciate a bit of help : We were running a long running delete job which gave the following error : Oracle8 Enterprise Edition Release 8.0.5.2.1 - Production PL/SQL Release 8.0.5.2.0 - Production SQLWKS> EXECUTE PKG_PAS_AnnualDataMaintenance.Delete_OldData (2000, '/home/sqribe/work/live', '2000AnnualDataDelete.log'); ORA-01562: failed to extend rollback segment number 8 ORA-01650: unable to extend rollback segment RSUNDB08 by 50 in tablespace RSUN425 ORA-06512: at "PAS.PKG_PAS_ANNUALDATAMAINTENANCE", line 66 ORA-06512: at line 2 I don't understand why it ran out of rollback space. The rollback segment has a virtually unlimited number of extents, so the only explanation I can see is that this particular rollback segment expanded until it exceeded the space allocation for the whole tablespace RSUN425, which is 3,000M. However, Oracle Storage Manager shows only 200M of the tablespace used, and it also shows high water marks against each rollback segment, none of which exceeds 400M. This would suggest to me that none of the previous month's deletions exceeded 400M per month, so why should it fail on this particular one when it had nearly 3,000M available? Is there something I am not understanding about rollback segments ?? Thanks and Regards, Samir Samir Sarkar Oracle DBA - Lennon Team SchlumbergerSema Email : [EMAIL PROTECTED] [EMAIL PROTECTED] Phone : +44 (0) 115 - 957 6217 EPABX : +44 (0) 115 - 957 6418 Ext. 76217 Fax : +44 (0) 115 - 957 6018 ___________________________________________________________________________ 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: SARKAR, Samir 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). 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MOHAMMAD RAFIQ _________________________________________________________________ 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: Mohammad Rafiq 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).