the first extent is used by oracle as the segment header to manage the transaction information within the rollback segment. The second extent contains the actual change vectors
--- [EMAIL PROTECTED] wrote: > Hi, > > My point was that it could allocate one more extent as per need. Why > the > need to minextents = 2? > > Thanks > Kumanan > > > -----Original Message----- > > From: Stephane Faroult [SMTP:[EMAIL PROTECTED]] > > Sent: 07 March 2002 20:54 > > To: Multiple recipients of list ORACLE-L > > Subject: Re: A rollback segment question on minextents > > > > [EMAIL PROTECTED] wrote: > > > > > > Hi, > > > > > > I was wondering why Oracle force minextents for rollback > > > segments to be two. Why can't we have minextents zero or > > > no minextents clause at all. > > > > > > We can surely set initial extent to be large enough ourselves > > > and next extent sized accordingly. > > > > > > Can someone enlighten me on the reason/thought behind this? > > > > > > Many thanks > > > > > > Kumanan Balasundaram > > > Database Administrator, IT > > > QXL ricardo plc > > > www.qxl.com > > > P: +44 (0)208 962 7409 > > > > Oracle doesn't reuse an extent which contains active transactions. > What > > do you think would happen when you reach the end of your initial > extent > > ? Exactly. > > -- > > Regards, > > > > Stephane Faroult > > Oriole Ltd > > -- > > Please see the official ORACLE-L FAQ: http://www.orafaq.com > > -- > > Author: Stephane Faroult > > 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). > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: > 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!? Try FREE Yahoo! Mail - the world's greatest free email! http://mail.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).
