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Home -> Community -> Mailing Lists -> Oracle-L -> Fwd: RE: 9i / 9iRAC : Segment_Space_Management AUTO, with LOB
Ian,
Could you explain how ASSM could be detrimental in a single instance environment ?
Vivek,
Could you provide details on the issues [BugNos, description of the problem, your findings]
you had with ASSM in 9iRAC ?
Hemant
At 07:09 AM 19-12-02 -0800, you wrote:
As part of a RAC benchmark with 9.2 we had faced severe LOCKING
on setting segment space management AUTO & had to REMOVE it
HTH
- -----Original Message-----
- From: Hemant K Chitale [mailto:hkchital@singnet.com.sg]
- Sent: Sunday, December 15, 2002 8:09 AM
- To: Multiple recipients of list ORACLE-L
- Subject: RE: 9i / 9iRAC : Segment_Space_Management AUTO, with LOB
- <<quotes from Oracle Manuals deleted >>
Bottomline : Either it was a bug or a restriction, it was not possible in 9.0.1 and supposed to be possible in 9.2.0 --- definitely
works in 9.2.0.2
Why do you say "In a single instance environment unless you are doing something out of the ordinary, use of the clause will probably be detrimental. " ?
Hemant
At 03:03 PM 14-12-02 -0800, you wrote:
Was the prohibitition on placing LOB's into tablespaces with automatic segment space management only a bug. I ask because the description of "auto" segment space management includes the following restrictions
<< quote from 9.0.1 manual deleted >>
One usually associates a bug with something the manual says one can do, but one cannot. I've not seen the 9.0.2 manual. Are the restrictions lifted?
In a single instance environment unless you are doing something out of the ordinary, use of the clause will probably be detrimental.
Ian MacGregor
Stanford Linear Accelerator Center
ian@slac.stanford.edu
-----Original Message-----
Sent: Friday, December 13, 2002 7:19 PM
To: Multiple recipients of list ORACLE-L
The first time we tried importing our 8.1.5 [OPS] database
into 9.0.1 and 9.2.0.1 with
EXTENT_MANAGEMENT Local for ALL tablespaces
SEGMENT_SPACE_MANAGEMENT Auto
we found that tables with LOB segments could not be created. This was a 9.0.1 bug which was expected to have been fixed in 9.2 [I believe it was Bug 1626182, referenced in Note 159078.1]
However, after going to 9.2.0.2, I WAS able to create
such tables in the database.
[the Patchset Notes include a reference to Bug 2326066. Unfortunately, I can't see either bug on MetaLink to verify if both are the same issue]
9iRAC strongly recommends SEGMENT_SPACE_MANAGEMENT Auto
instead of using Free_Lists and Free_List_Groups. [Part 3, Appendix B of the 9iRAC Deployment and Performance manual].
Are there any real-life experiences / gotchas with LOB Segments in Locally Managed Tablespaces and Segment_Space_Management Auto ? There seem to be a number of bug-fixes for Segment_Space_Management=AUTO in the 9.2.0.2 PatchSet Release Notes.
Hemant K Chitale
My web site page is : http://hkchital.tripod.com
Hemant K Chitale
My web site page is : http://hkchital.tripod.com
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale INET: hkchital@singnet.com.sg 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: ListGuru@fatcity.com (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). Received on Sat Dec 21 2002 - 22:43:36 CST