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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Good technical documents/references on tuning restores
<FONT face="Comic Sans MS" color=#0000ff
size=2>I had that problem in a 9.2.0.3 AIX4.3.3 to AIX 5L upgrade... missing
with really weird names... if you look at your tablespace sizes, the ones that
are 0 bytes are the ones that have the missing files. If you can figure
out what files go with those tablespaces, shutdown the database, "fix" the
create control file script so those files are in it (if those tablespaces and
files are still valid in the database)... and startup nomount and run the script
again... it will tell you that you have those datafiles needing media
recovery.
<FONT face="Comic Sans MS" color=#0000ff
size=2>
<FONT face="Comic Sans MS" color=#0000ff
size=2>recover datafile '<fully qualified datafile
name>'
<FONT face="Comic Sans MS" color=#0000ff
size=2>
<FONT face="Comic Sans MS" color=#0000ff
size=2>If the tablespaces and files aren't valid anymore, you can offline drop
them and they won't be in the data dictionary OR in the control file...
<FONT face="Comic Sans MS" color=#0000ff
size=2>
April Wells <FONT
face="Comic Sans MS" size=2>Oracle DBA/Oracle Apps DBA <FONT face="Comic Sans MS" size=2>Corporate Systems <FONT face="Comic Sans MS" size=2>Amarillo TexasYou will recognize your own path when you come upon it, because you will suddenly have all the energy and imagination you will ever need.
<FONT face=Tahoma
size=2>-----Original Message-----From: Ruth Gramolini
[mailto:[EMAIL PROTECTED]Sent: Wednesday, June 04, 2003
11:05 AMTo: Multiple recipients of list ORACLE-LSubject:
Re: Good technical documents/references on tuning
restores
Paula,
Have you tried backing up your controlfile to
trace, editing the trace file to get rid of the unwanted datafiles, and
reopening the database with the new edited controlfile? That should get
rid of them. Of course, to a backup immediately after this.
Good luck,
Ruth
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
Sent: Wednesday, June 04, 2003 10:09
AM
Subject: RE: Good technical
documents/references on tuning restores
<FONT face=Arial color=#0000ff
size=2>Paula,
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>IIRC 'MISSING' means it is in the data dictionary, but not the
control file. I've gotten that before, but haven't played that game in a
while. You might be able to 'DROP' them, but I'm not sure. Check that first
on a mini-test system.
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>Henry
<FONT face=Tahoma
size=2>-----Original Message-----From: <A
href="mailto:[EMAIL PROTECTED]">[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]On Behalf Of
[EMAIL PROTECTED]Sent: Tuesday, June 03, 2003
11:05 PMTo: Multiple recipients of list
ORACLE-LSubject: RE: Good technical documents/references on
tuning restores
<FONT face=Arial color=#0000ff
size=2>Okay,
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>Database open and I wanted to not restore and not reference certain
index and materia. view datafiles. Now the datafiles show up with
weird MISSING...... names. How do I clean this
up?
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>Thanks,
<FONT face=Arial color=#0000ff
size=2>paula
<FONT face=Tahoma
size=2>-----Original Message-----From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]Sent: Tuesday, June 03,
2003 10:20 PMTo: Multiple recipients of list
ORACLE-LSubject: RE: Good technical documents/references on
tuning restores
Strange:
looking at v$backup_async_io found some datafiles
where <FONT
size=2>active bytes per sec
long-waits <FONT
size=2>
2154608
297
7489829
297
How can I start finding the disparity?
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
9:05 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
Did I say that throughout this restore/recovery process
my tapes being mounted and unmounted while other database backups and
cloning was occurring. Big duh - this has got to be slowing down
the process. Any ideas on how to handle this? Perhaps more
than one tape subsystem would be better or while doing restores other
backup utility is halted - hmmm - but that risks those other
systems? How can I sell that? Hmmmm. Maybe I will
first backup to disk. Yep, one backup to disk.
Yep.....
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
9:00 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
See nwadmin shows parellism = 32. I am not the
tape person - that is my sys admin. I don't believe they actually
have 32 tapes involved only 4. Can this impact performance by
setting this too high? I also notice one backup server for
networker with nwadmin messages like "clone sets being created...",
"other databases being backed up". What is the usual policy on
concurrently running backups, cloning at the same time recovery is
taking place. It appears to show a lot of media waiting
events: waiting for dlt7000 tape ... of the tapes that I
specifically need for this restore. Did I say: I love my
admin...I love my admin....I love my admin...
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:53 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
Okay, almost 4 minutes for a datafile that was 78168
blocks - how do I know if this is reasonable?
Also, seems to write these files out (restore sychron.)
why can't it restore different datafiles in parallel? - stupid
question huh?
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:46 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
SELECT SID, SERIAL#,
CONTEXT,
ROUND(SOFAR/TOTALWORK*100,2) "%
complete",
SUBSTR(TO_CHAR(SYSDATE,'HH24:MI:SS'),1,15) "Time
now" FROM
V$SESSION_LONGOPS
WHERE OPNAME like
'%restore%';
<FONT
size=2>.
showed all 100% complete but msglog from RMAN
shows it is truly still running.
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:40 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
Also found on monitoring performance of RMAN
jobs: Note:144640.1 on Metalink
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:36 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
Found this white paper:
<A target=_blank
href="http://otn.oracle.com/deploy/availability/pdf/rman_performance_wp.pdf">http://otn.oracle.com/deploy/availability/pdf/rman_performance_wp.pdf
Anything better?
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:33 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
This is what I have set on my target database:
----------------------------------- -------
------------------- <FONT
size=2>backup_tape_io_slaves
boolean
FALSE
<FONT
size=2>tape_asynch_io
boolean
TRUE
Version 8.1.7.4 database and RMAN catalog - 32
bit Networker MML Using
RAID 1+0 Solaris 2.8
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:28 PM To: Stankus, Paula G;
'[EMAIL PROTECTED]' Subject: RE: Good
technical documents/references on tuning restores
Okay - from my reading you don't need to have multiple
tape io slaves if you are using asynch. I/O. Again, best document
for perf. tuning database restores using RMAN would make mucho
difference. Read old note about someone doing an analyze on the
RMAN catalog tables to improve performance of restore. I think it
has something to do with how quickly it finds the file on tape and
writes to disk.
-----Original Message----- From:
Stankus, Paula G Sent: Tuesday, June 03, 2003
8:25 PM To: '[EMAIL PROTECTED]'
Subject: RE: Good technical documents/references on
tuning restores
Seems to be taking awfully long to read files from tape
and write to disk. I allocate multiple tape channels like I do for
the backup which only takes about 45 minutes. Does not seem to be
spawning multiple sessions. Do I need to change parameters on my
init.ora file to use multiple tape io slaves to see this. Anyway, would
like notes/docs., references if you all have some.
Thanks, Paula
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