There are various problems with ASSM that result in lost space - e.g. rollbacks do not reset the btmaps correctly. I also have an example (see the website below for " miscellaneous -> bust bits") which demonstrates that the implementation of ASSM has not been rolled out across all space management code points. Also, you get a couple of space management blocks per extent, rather than a few per segment.
On the other hand, my example is a special case, and if you don't care about leaking space all over the place, and if you have a problem relating to freelist (group) management in RAC, then ASSM may be a boon that you can afford to pay for. It's the usual cost/benefit/risk triangle. Regards Jonathan Lewis http://www.jlcomp.demon.co.uk Coming soon one-day tutorials: Cost Based Optimisation Trouble-shooting and Tuning Indexing Strategies (see http://www.jlcomp.demon.co.uk/tutorial.html ) ____UK_______March 19th ____USA_(FL)_May 2nd Next Seminar dates: (see http://www.jlcomp.demon.co.uk/seminar.html ) ____USA_(CA, TX)_August The Co-operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: 24 February 2003 16:29 comments > All the hearsay evidence I've seen (including comments attributed to Cary at > his HotSOS symposium that I heard second hand last week) leads me to believe > that don't #5 is true...I must admit I've not done benchmarking myself... > :-) > > I am, however, ever open minded. > > RF > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jonathan Lewis INET: [EMAIL PROTECTED] 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: [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).
