Hi Tanel,
Thanks for your inputs. I have given my understanding would
request you to provide your inputs.
There are two kinds of checkpoints that happen( Full checkpoint
and Incremental Checkpoint)
Full Checkpoint happens during
-
> >Whenever checkpoint happens datafile header scn and controlfile scn
> > will be in sink. Is my assumption is right? Is there any other scenarios
> > where checkpoint only update controlfile and doesn't update datafile
> > header? Agreed, during "begin backup" mode datafile header will be
> >
>Whenever checkpoint happens datafile header scn and controlfile scn
> will be in sink. Is my assumption is right? Is there any other scenarios
> where checkpoint only update controlfile and doesn't update datafile
> header? Agreed, during "begin backup" mode datafile header will be
> frozen..
Yep, you're correct, everything is frozen in datafiles when they're in read
only mode (you can have read only datafiles on read only media if you want).
Also, no controlfile records (like checkpoint cnt, checkpoint scn) for read
only datafiles are not changed, I've verified this with controlfile du
I don't believe that datafiles in Read Only tablespaces have the scn updated. I've not
tested it, but it is logical.
Daniel Fink
[EMAIL PROTECTED] wrote:
>
> All,
>Whenever checkpoint happens datafile header scn and controlfile scn
> will be in sink. Is my assumption is right? Is there any
If the datafile is off-line? (Not tested, just a guess.)
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Fri 1/16/2004 12:04 AM
To: Multiple recipients of list ORACLE-L
Cc:
Subject:Checkpoint ...
All,
Whenever checkpoint happens datafi
Title: RE: checkpoint not complete
> -Original Message-
> From: Mike Sardina [mailto:[EMAIL PROTECTED]]
>
> I am noticing in the Alert Log that it notes quite often
> "Checkpoint Not
> Complete". What causes this? Does something need to be tuned? What
correction.
THx
-Seema
>From: Mogens Nørgaard <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
>Subject: Re: CHECKPOINT?
>Date: Tue, 29 Jan 2002 08:00:43 -0800
>
> Log file sync is another name for
Log file sync is another name for commit. So have fewer commits or
make them faster is the extremely short answer. But these values are
taking out of context - if the time_waited for log file sync is small
compared to the total response time, then who cares? :).
Mogens
Seema Singh wrote:
>
Seema:
Regarding the "Checkpoint not completed." message, make sure you're
checkpointing only at redo log switches.
Check loc_checkpoint_timeout and log_checkpoint_interval values.
If these values are OK and you still keep getting "Checkpoint not
completed." messages in the alert.log
Seema
First remember the old rule : If it's not broken don't fix it.
There is a rule of thumb that redo log switches should happened app.
every 30 minutes, but if you se redo log switches
happening more often at some times and nobody is complaining then just
ignore the it. If you have a perfor
That doesn't sound at all right.
30 minutes is outrageous!
Try Mladen's suggestion.
-Don Granaman
[OraSaurus]
- Original Message -
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Friday, November 09, 2001 1:50 PM
> I have LOG_CHECKPOINTS_TO_ALERT set in my init.ora
Check v$system_event to see what are the most waited for things in your
database.
You can also check v$session_wait for the wait events in sessions
coresponding to
CKPT, DBW, LGW & SMON. Find those events in Oracle reference (available
online)
and see if those guys are waiting for anything special
These messages will show up in your 8.0.x database if you have set
log_checkpoints_to_alert=TRUE. This gives you an easy way of seeing how
long it takes to complete a checkpoint and if any are happening between log
switches.
Mike Hand
Polaroid Corp
-Original Message-
Sent: Tuesday, Aug
I still think it's redo block address!
-Original Message-
Sent: Wednesday, August 22, 2001 12:50 AM
To: Multiple recipients of list ORACLE-L
Kevin,
Thanksclarity is always preferable.
As for the acronym inflationI guess when I wrote "block" instead of
"byte", I simply hadn'
Which as we all know courtesy of Mike Hately, stands for redo trace file
manager, now a discontinued feature ...
greg
-Original Message-
Sent: Wednesday, 22 August 2001 03:50
To: Multiple recipients of list ORACLE-L
Or just be like me and spend most of the time saying "rtfm" :)
joe
"Mo
Kevin,
Thanksclarity is always preferable.
As for the acronym inflationI guess when I wrote "block" instead of
"byte", I simply hadn't smoked enough DBA crack. (That's Data Block Address,
I think, but...where *did* i leave that mushroom tea...darnit...)
:)
Ross
-Original Messag
8i implements lazy checkpointing. The dirty buffers
are flushed to disk but the datafile headers are
updated later and when all the datafile headers are
updated the checkpoint complete is written to the
alert log. So it is not uncommon to checkpoints taking
longer in 8i.
Scott
--- Kevin Tsay <[
Ross:
I believe that RBA is referred to Redo Byte Address (Checkpoint RBA).
The checkpoint RBA is stored in the control file. When recovery is required,
the checkpoint RBA determines the location in the redo stream from which to
start applying recovery.
kevin
-Original Message-
Sent: Tu
Or just be like me and spend most of the time saying "rtfm" :)
joe
"Mohan, Ross" wrote:
>
> smacks of incremental checkpointing...new implemented
> in 8i i thinkthe RBA is a redo block address.
>
> More than that, and you'll have to smoke some DBA crack,
> make some guru mushroom tea, hack
smacks of incremental checkpointing...new implemented
in 8i i thinkthe RBA is a redo block address.
More than that, and you'll have to smoke some DBA crack,
make some guru mushroom tea, hack the internals, write a
book, and then become highly enigmatic and largely helpful.
-Original M
I get the same kind of message, anyone knows what it means?
Saludos,
Veronica Levin Enriquez
Administrador AIX
Compañía Cervecera de Nicaragua
-Mensaje original-
De: mala singh [mailto:[EMAIL PROTECTED]]
Enviado el: Lunes, 23 de Octubre de 2000 03:01 p.m.
Para: Multiple recipients of l
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