Parm Patram » Administration

Turn on agent debugging (VCS)

admin — Tue, 13 Dec 2011 20:48:44 +0000

http://www.symantec.com/business/support/index?page=content&id=HOWTO58833

Show percent free in ASM disk group

admin — Mon, 18 Oct 2010 16:35:43 +0000

select name, (usable_file_mb/total_mb)*100 percent_free from V$ASM_DISKGROUP_STAT;

Getting OEM to work on Vision 12i

admin — Sat, 09 May 2009 18:04:51 +0000

1. emca -config dbcontrol db -repos create

2. by default the sys user is NOT in the remote password file and will NOT be able to login via OEM. Add the user:
$ORACLE_HOME/bin/orapwd file=$ORACLE_HOME/dbs/orapw password=hullahoop

Show grants for a specific user

admin — Sat, 09 May 2009 17:31:28 +0000

select privname,object_name from ku$_objgrant_view join all_objects on object_id=obj_num where grantee=’THE_USER’;

Identify invalid online redo logs

admin — Mon, 04 May 2009 11:33:37 +0000

select group#,l.sequence#,archived,l.status running, lf.status os_status,member from v$log l join v$logfile lf using(group#) order by group#;

NOTES:

The STATUS column of v$logfile (os_status) is NOT refreshed in real-time. Information is updated on log switch.

Adding new databases to OEM

admin — Mon, 04 May 2009 01:41:18 +0000

emca -deconfig dbcontrol db

and

emca -config dbcontrol db

Create raw devices for ASM

admin — Mon, 04 May 2009 01:26:00 +0000

http://oracle.3dub.com/ASM_20.shtml

Recovery Scenario: bad datafile AND missing online redo

admin — Sun, 03 May 2009 01:50:02 +0000

1. Trying to start the database using ’startup’ will fail trying to open the datafile. It will give the datafile number let’s say D.

2. Make sure we have backups of all the datafiles. In RMAN type:
REPORT NEED BACKUP REDUNDANCY 1;

If there are datafiles that were not backed up as yet, there are 2 options:
a) delete the datafiles. (RMAN will create them and apply their data from redo logs).
b) issue RMAN command:
BACKUP DATAFILE N;

3. Use RMAN to restore and recover the datafile found missing in step #1. The recovery operation will fail because the online redo is missing.
RESTORE DATAFILE D;
RECOVER DATAFILE D;

4. Find the last log sequence:
SELECT SEQUENCE# FROM V$ARCHIVED_LOG WHERE RECID = (SELECT MAX(RECID) FROM V$ARC
HIVED_LOG);

5. Run the following RMAN script. The nunber X will be 1 more than the number you got from step 4. This is because the UNTIL SEQUENCE clause of RMAN goes to one less than the number specified.

RUN {
SET UNTIL SEQUENCE X THREAD 1;
RESTORE DATABASE;
RECOVER DATABASE;
ALTER DATABASE OPEN RESETLOGS;
}

Add databases to OEM

admin — Fri, 01 May 2009 14:32:01 +0000

emca -deconfig dbcontrol db

then

emca -config dbcontrol db

Enabling different block size for a tablespace

admin — Fri, 01 May 2009 12:59:49 +0000

You have to setup a cache for the size you want to create if it is different from DB_BLOCK_SIZE initialization parameter like so:

alter system set db_k_cache_size= scope=BOTH;