Configure OEM in 10G R1/R2

Pre-Requestits

a. Password file is required.
b. Set remote_login_passwordfile is set to EXCLUSIVE or SHARED.
c. Increase the job_queue_processes more that 1.
d. Emca is located in $ORACLE_HOME/bin

Create DB Console repository object and configuration files

Oracle 10.1

Emca –r (create repository object only)
Emca (create both)

Oracle 10.2

emca –repos create (create repository object only)
emca –config dbcontrol db (create config file only) (or)
emca –config dbcontrol db –repos create (create both)

Delete and recreate database console

There are 5 way to remove db control objects.

Delete db control config files using emca script
Delete db control config files manually
Delete db control repository using RepManager
Delete db control repository manually
Delete both config and repository using emca script.

Using emca script

Oracle 10.1 > Emca –x

Oracle 10.2 >

Emctl stop dbconsole

Emca –deconfig dbcontrol db (won’t drop repository) (Or)
Emca -deconfig dbcontrol db –repose drop (drop the repository also)

Manually

Remove the following files from your filesystem
ORACLE_HOME\_
ORACLE_HOME\oc4j\j2ee\OC4J_DBConsole__
On windows you also need to remove console service from registry

Run > Regedit
Navigate > HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/OracleDBConsolesid

Action > delete (Or )
Command line : sc delete
Eg : service_name = OracleDBConsole

Using RepManager (not recommended)

ORACLE_HOME/sysman/admin/emdrep/bin
RepManager –sys_password –action drop
But don't delete by RepManager. It puts the database in quiescence mode.

Both at the same time

Oracle 10.1 > emca –x sid
Repmanager hostname listner_port sid –action drop
Oracle 10.2 > emca –deconfig dbcontrol db –repos drop

Recreate config files and repository

Config files only

Emca –repose recreate
Emca –config dbcontrol db
Emca –reconfig ports –DBCONTROL_HTTP_PORT_

Config files and repository

Emca -config dbcontrol db –repose recreate (or)
Emca –config dbcontrol db –repose recreate –SID -PORT -ORACLE_HOME -DBCONTROL_HTTP_PORT_

4. How to Drop Misconfigured repository

a. ORACLE_HOME/sysman/admin/emdrep/bin
b. Set SID and Run the following command

RepManager –sys_password –action drop

5. Commands to Star, Stop and check the Status of Console

a. Emctl start dbconsole
b. Emctl status dbconsole
c. Emctl stop dbconsole

6. Commands to start, stop and check status of EM Agent

a. Emctl start agent
b. Emctl status agent
c. Emctl stop agent

7. Connect to database control portal

http://HOSTNAME:portnumber>/em

8. Files and Folders

Local Configuration files.

$ORACLE_HOME/_
Port Number is updated in config file, this file is updated by emca while installing.
$ORACLE_HOME/install/protlist

Alert Log file location

$ORACLE_HOME/ cfgtoollogs/emca/

In Windows you can check Services.msc for running services

ORA - 16179

ORA - 16179 : incremental changes to "log_archive_dest_1" not allowed with spfile

SQL> alter system set log_archive_dest_1='d:\archive\' scope=spfile; 

alter system set log_archive_dest_1='d:\ora\' scope=spfile 

* 

ERROR at line 1: ORA-32017: failure in updating SPFILE ORA-16179: 

incremental changes to "log_archive_dest_1" not allowed with SPFILE

When i try to enable Archivelog mode in production server, i faced this ORA-16179. 

production server is version 10.1.0.2 and host is solaris sparc 64bit.

Cause:

Incremental changes to a log_archive_dest_n parameter cannot be made when using an SPFILE. 

Solution: 

Specify either LOCATION or SERVICE plus all other attributes to  be set in one ALTER SYSTEM/SESSION SET command.

Action :

SQL> ALTER SYSTEM SET log_archive_dest_1 = 'LOCATION=/db1/archive';

System altered.

Reff: Metalink Doc ID: 194494.1

EM : Policy violation

Policy rule 1 : Insufficient Number of Control Files

Cause : there is only one control file in the database

Solution : Control file multiplexed..

Action : Shutdown immediate;

Startup mount;

alter system set control_files='/path/control01.ctl','/path/newcontrol02.ctl' scope=spfile;

shutdown immediate;

startup;

Policy rule 2 : Insufficient Number of Redo Logs

cause : i have two groups in my database, but each group has only one member.

Solution : Log member multiplexed

Action : Using EM control log members added...

Policy rule 3 : EXECUTE UTL_FILE privileges to PUBLIC

Cause : bydefault 'UTL_FILE' privilege grant to PUBLIC profile.

Action : Revoke execute utl_file from public;

But still policy violation still shown.
Reason, there are many other polices are set to public profile ( UTL_SMTP, UTL_TCP, UTL_HTTP and DBMS_RANDOM).

EM- java.lang.Exception:UnknownHostException

Environment : Windows XP sp3, Oracle 10.2.0.4.0

Problem : When i connect to EM console, with SYS user. it thrown an exception error message

Error : java.lang.Exception: UnknownHostException sending request :: naachi-514ccc13

Cause : Recently I was changed the server hostname. previously it was "naachi-514ccc13", now it is "naachi".

Solution : d:\> emca -config dbcontrol db -repose recreate

The following action will be performed automatically by the above single line.

>>> Stop the database control
>>> Drop the database control
>>> Create the database control
>>> Start the database control

Status : successfully problem solved.

Clone using Export Dump

create a new database or clone a existing database or recover using oracle export Dump.

1. You must have full backup dump

2. List the content from export dump

Imp file=’/dump/xyz.dmp’ log=’/dump/imp.log’ full=y show=y
It will list all sql statement in log (imp.log)

c. Open the imp.log file, search and find the tablespace and users sql statements

i. Create tablespace .......
ii. Create users ....
iii. Create index..
iv. And what every you want

d. Copy and past it in a file.sql. now u will the script for creating a database.

e. Copy and save ‘create user.. ‘ is seperate file and ‘create tablespace..’ in sepereate sql file.

3. Create required folders (bdump,udump, also oradata)

4. Edit the pfile, use it from backup, if not. copy it from old db alert log or statspack report if u have.
5. Create oracle service

Windows : oradim –new –sid xxx
Solaris : export oracle_sid= xxx

6. Startup the database

Sqlplus “/as sysdba”
Startup nomount pfile=’/pfile.ora’

7. Run the script

$> @ file.sql
It will create all tablespaces

8. Open the database

Alter database mount;
Alter database open;

9. Create the users

Run the script to create users
@users.sql’

10. Import the datas

Imp file=’/dump/xyz.dmp’ log=’/dump/imp.log’ full=y

After import data, update the database metrics using analyze command..