Re: background process "LGWR" did not start

I can almost guarantee that the issue will go away if you reboot the machine. I cannot fathom how would shared memory segments survive reboot.

On 12/05/2003 11:49:24 AM, Jared.Still_at_radisys.com wrote:
> In regards to Bambi's comments about having a single instance on the
> server,
> this situation gets more complex if you have several instances on a
> server.
>
> There's also the possibility that the instance(s) shared memory is in more
> than one segment.
>
> You can use ipcs and oradebug to decipher which memory segments belong
> to which instance. Google for ipcs and oradebug, several helpful
> references
> showed up when I tried it.
>
> HTH
>
> Jared
>
>
>
>
>
>
> "Bellow, Bambi" <bbellow_at_chi.navtech.com>
> Sent by: ml-errors_at_fatcity.com
> 12/05/2003 08:34 AM
> Please respond to ORACLE-L
>
>
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> cc:
> Subject: RE: background process "LGWR" did not start
>
>
> Hi John!
>
> When I've run into this problem it was because there was a memory segment
> being forced open. If you have the same issue, I can hep. First,
> assuming
> that you're on Unix (if you're not, please ignore the rest of this email
> and
> just have a lovely day), and that your database is down (otherwise, if you
> wanted to do a shutdown abort, that wouldn't be such a bad thing), you can
> do an
>
> ipcs -mA
>
> If that was the only instance on your box, the rest is pretty easy, cuz
> the
> offending segment is the only one owned by oracle in the list. If it
> wasn't, and there are other oracle segments on the box, you have to find
> out
> which one is your guy. The memory segments associated with a particular
> instance should have very similar (but not exactly the same) CTIMEs. If
> there is one way out of whack, that's your guy. Now, this is where my
> memory gets a little fuzzy (age, doncha know?)... if the instances started
> up at nearly exactly the same time for some reason, you are looking for a
> "0" in the <insert hem and haw> segsz(?) column (anybody remember fersher
> on
> this one?). By now, you should know which memory segment to kill.
>
> To kill the offending memory segment, do an
>
> ipcrm -m <segment>
>
> on it. You, of course, want to be exceedingly careful here, and just
> assume
> that all the usual disclaimers apply. If you kill the wrong segment, your
> other database is not going to be very happy about it.
>
> But assuming you killed the right segment, your database with the LGWR
> problem should be well and truly down. Bring 'er on up and the LGWR
> process
> should come up just fine.
>
> Bambi.
>
> -----Original Message-----
> Sent: Thursday, December 04, 2003 8:34 AM
> To: Multiple recipients of list ORACLE-L
>
>
> Anyone know what might be causing this error? Oracle 8.1.7 on Solaris.
>
> background process "LGWR" did not start
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: John Dunn
> INET: john.dunn_at_sefas.co.uk
>
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Mladen Gogala
Oracle DBA

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Author: Mladen Gogala
  INET: mladen_at_wangtrading.com

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