doesn't sound like you are doing anything stupid, and I ran on 8.1.6.0 and it said it would shrink it but didn't. I'll use your test case against my databases in the morning
--- "Johnston, Tim" <[EMAIL PROTECTED]> wrote: > Ok... I've ran this test case on both a 8.1.6.0 and a 8.1.7.3 > database... > I've ran it with both public and private rollback segments (just in > case)... > I've looked at rssize in v$rollstat and sum(bytes) from > dba_segments... > And, in all cases, it allows me to shrink the segment to less then > both > optimal and min_extents*extent_size even though > optimal=min_extents*extent_size... Is there something wrong in the > test > case? Has anyone ran this on one of their test databases? I'm > confused > since the test case seems straight forward... The way I read, it > allows me > to perform the shrink and the resulting segment is actually the size > I > specify... Am I doing something stupid in the test case? > > Thanks > Tim > > PS - Here is the test case again... > > column segment_name format a30 > create public rollback segment tim tablespace rbs storage ( initial > 1M next > 1M minextents 20 maxextents 100 optimal 20M ); > alter rollback segment tim online; > select segment_name, min_extents, initial_extent, next_extent > from dba_segments > where segment_name = 'TIM'; > select rs.extents, rs.rssize/1048576 , rs.optsize/1048576 > from dba_rollback_segs drs, > v$rollstat rs > where drs.segment_name = 'TIM' > and drs.segment_id = rs.usn; > alter rollback segment TIM shrink to 10M; > select segment_name, min_extents, initial_extent, next_extent > from dba_segments > where segment_name = 'TIM'; > select rs.extents, rs.rssize, rs.optsize > from dba_rollback_segs drs, > v$rollstat rs > where drs.segment_name = 'TIM' > and drs.segment_id = rs.usn; > alter rollback segment tim offline; > drop rollback segment tim; > > -----Original Message----- > Sent: Wednesday, January 30, 2002 2:31 PM > To: Multiple recipients of list ORACLE-L > > > Um... Must be version differences... Here is a test case I ran on > my > 8.1.7.3 machine... > > SQL> create public rollback segment tim tablespace rbs storage ( > initial 1M > next 1M minextents 20 maxextents 100 optimal 20M ); > > Rollback segment created. > > SQL> alter rollback segment tim online; > > Rollback segment altered. > > SQL> select segment_name, min_extents, initial_extent, next_extent > 2 from dba_segments > 3 where segment_name = 'TIM'; > > SEGMENT_NAME MIN_EXTENTS INITIAL_EXTENT NEXT_EXTENT > ------------------------------ ----------- -------------- ----------- > TIM 20 1048576 1048576 > > SQL> select rs.extents, rs.rssize/1048576 , rs.optsize/1048576 > 2 from dba_rollback_segs drs, > 3 v$rollstat rs > 4 where drs.segment_name = 'TIM' > 5 and drs.segment_id = rs.usn; > > EXTENTS RS.RSSIZE/1048576 RS.OPTSIZE/1048576 > ---------- ----------------- ------------------ > 20 20.296875 20 > > SQL> alter rollback segment TIM shrink to 10M; > > Rollback segment altered. > > SQL> select segment_name, min_extents, initial_extent, next_extent > 2 from dba_segments > 3 where segment_name = 'TIM'; > > SEGMENT_NAME MIN_EXTENTS INITIAL_EXTENT NEXT_EXTENT > ------------------------------ ----------- -------------- ----------- > TIM 20 1048576 1048576 > > SQL> select rs.extents, rs.rssize, rs.optsize > 2 from dba_rollback_segs drs, > 3 v$rollstat rs > 4 where drs.segment_name = 'TIM' > 5 and drs.segment_id = rs.usn; > > EXTENTS RSSIZE OPTSIZE > ---------- ---------- ---------- > 10 10633216 20971520 > > SQL> alter rollback segment tim offline; > > Rollback segment altered. > > SQL> drop rollback segment tim; > > Rollback segment dropped. > > SQL> > > What version is your test running on? > > Tim > > PS - Here is my test case if you want to run it... > > column segment_name format a30 > create public rollback segment tim tablespace rbs storage ( initial > 1M next > 1M minextents 20 maxextents 100 optimal 20M ); > alter rollback segment tim online; > select segment_name, min_extents, initial_extent, next_extent > from dba_segments > where segment_name = 'TIM'; > select rs.extents, rs.rssize/1048576 , rs.optsize/1048576 > from dba_rollback_segs drs, > v$rollstat rs > where drs.segment_name = 'TIM' > and drs.segment_id = rs.usn; > alter rollback segment TIM shrink to 10M; > select segment_name, min_extents, initial_extent, next_extent > from dba_segments > where segment_name = 'TIM'; > select rs.extents, rs.rssize, rs.optsize > from dba_rollback_segs drs, > v$rollstat rs > where drs.segment_name = 'TIM' > and drs.segment_id = rs.usn; > alter rollback segment tim offline; > drop rollback segment tim; > > -----Original Message----- > Sent: Wednesday, January 30, 2002 2:17 PM > To: Multiple recipients of list ORACLE-L > > > testing.... > > if the initial extent*min_extents is less than the optimal, yes you > can > shrink below optimal. > > if initial*minextents = optimal, you can execute an alter rollback > segment statement that lists a shrink size that is less than optimal > AND less than initial*minextents and it will not fail. But if you > LOOK > at the size it shrinks to, it's initial*minextents. > > so you can "kinda" shrink below optimal, the statement won't fail, > but > Oracle will ignore the number you give it. > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Johnston, Tim > 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). __________________________________________________ Do You Yahoo!? Great stuff seeking new owners in Yahoo! Auctions! http://auctions.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Rachel Carmichael 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).
