RE: pmon & smon transaction recovery/rollback

If a session process fails or is explicitly told to rollback pmon uses
the session process to do the work.  I suspect that when you killed the
processes you effectively killed the pmon rollback operation so smon
took over.
 

-- Mark D Powell -- 
Phone (313) 592-5148 

 


________________________________

        From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of amonte
        Sent: Wednesday, January 31, 2007 10:09 AM
        To: Kevin Lidh
        Cc: oracle-l@xxxxxxxxxxxxx
        Subject: Re: pmon & smon transaction recovery/rollback
        
        
        yes, I think you mean setting event 10513 to level 2, however my
question is, isnt that really a pmon's job?
        
        
        
        
        On 1/31/07, Kevin Lidh < kevin.lidh@xxxxxxxxx
<mailto:kevin.lidh@xxxxxxxxx> > wrote: 

                A long time ago on a database far, far away, we killed a
process which 
                was in the process of consuming a large amount of temp
and SMON worked
                for hours on that tablespace.  We actually had to set an
event to
                "pause" SMON until we had the time to allow TEMP to be
cleaned up. 
                
                On Wed, 2007-01-31 at 12:53 +0100, amonte wrote:
                > Hi
                >
                > I have a basic question, we all know that pmon's task
is to cleanup
                > resource by failed processes such as rolling back
transaction, 
                > releasing locks and resources etc. We also know that
smon rolls back
                > uncommited transactions after instance failure.
                >
                > My question is, I killed a couple of processes this
morning and smon
                > went crazy performing parallel recovery, I was
wondering shouldnt that
                > pmon's job? There was no instance failure.
                >
                > TIA
                >
                > Alex
                >

Other related posts: