RE: RE: checkpoint incomplete issue

Thats not how Oracle works. Until all those operations are complete, the online redo log could not be reused. During the subsequent instance recovery, Oracle would reapply all those changes, if required.

RF

Robert G. Freeman
Management Consultant
TUSC - The Oracle Experts www.tusc.com
OCP - 7, 8, 8i, 9i, 10g
Author:
Portable DBA Oracle
Oracle Database 10g New Features
Oracle9i RMAN Backup and Recovery
Oracle9i New Features

-----Original Message-----
From: biti_rainy [mailto:biti_rainy_at_itpub.net] Sent: Thursday, November 18, 2004 10:56 PM To: Freeman Robert - IL; 'susan lam '; oracle-l-bounce_at_freelists.org; oracle-l_at_freelists.org
Subject: Re: RE: checkpoint incomplete issue

hi,Freeman Robert - IL

(you would have to do media recovery
after shutdown abort in some cases if this was not so)   

-----i am not sure : during the abort , at the moment ,oracle changing the datafile header or controlfile imformation but not compelete.

Best regards

msn: biti_rainy_at_hotmail.com
a dba from alibaba(china)

• from the mail-----
  >Even though a logfile has been archived, it's contents still need to be
  >written to disk via a checkpoint before it can be used again. This insures
  >that instance recovery is possible (you would have to do media recovery
  >after shutdown abort in some cases if this was not so).
  >
  >So, what is happening is that your disks are not keeping up with the
  >checkpoint volume. Until the checkpoints can complete, your database will
  >just stall, waiting.
  >
  >Look at your disks and see if there is something you can do to spread the
  IO
  >around better. This can mean more disks, or perhaps just moving some
  >datafiles around. I don't know if you are sititng on a SAN or JBODS, but
  >this is the area that you are most likley going to need to address.
  >
  >Cheers,
  >
  >Robert
  >
  >Robert G. Freeman
  >Management Consultant
  >TUSC - The Oracle Experts www.tusc.com
  >OCP - 7, 8, 8i, 9i, 10g
  >Author:
  >Portable DBA Oracle
  >Oracle Database 10g New Features
  >Oracle9i RMAN Backup and Recovery
  >Oracle9i New Features
  >
  >
  >-----Original Message-----
  >From: oracle-l-bounce_at_freelists.org
  >To: oracle-l_at_freelists.org
  >Sent: 11/18/2004 3:29 PM
  >Subject: checkpoint incomplete issue
  >
  >I'm running a batch updates on my database and I've
  >been getting the following messages in my alert file:
  >"cannot allocate new log
  >check point incomplete."
  >
  >My job hangs waiting on log file switch (checkpoint
  >incomplete) event.
  >
  >I have 8 redo log groups (300MB members). When I did a
  >query on v$log, all of the log members' archived
  >status ='YES' except for the current member. So it
  >appears that the rest of the seven groups have been
  >archived but yet the database could not advanced to
  >the next redo log.
  >
  >Furthermore, the alert.log does not show frequent log
  >switches. It switches log every 10mins and about every
  >5mins, the database complains
  >about "cannot allocate new log". Does not appear to be
  >a problem with the number or size of the redo logs.
  >Anyone has any idea what may be a possible problem?
  >checkpoint?
  >
  >thanks.
  >
  >susan
  >
  >
  >
  >
  >__________________________________
  >Do you Yahoo!?
  >The all-new My Yahoo! - Get yours free!
  >http://my.yahoo.com
  >
  >
  >--
  >http://www.freelists.org/webpage/oracle-l
  >--
  >http://www.freelists.org/webpage/oracle-l
  >
  >.
  

????????

--
http://www.freelists.org/webpage/oracle-l