Oracle pre-patch configuration document - download.gofrugal...

Before Start Import Data & Patch Operation
Database Configuration:
Oracle 10g, 11g ORCLConfiguration
STEP 1. Connect into sql*plus as DBA and issue below command to create initorcl.ora file
File created under below location
create pfile from spfile;
exit
Windows:
E:\oracle\product\10.2.0\db_1\database\initorcl.ora
Linux:
/home/oracle/product/10.2.0/db_1/dbs/initorcl.ora
STEP 2. Edit initorcl.ora with wordpad in windows, vi editor in linux and add following
If System RAM Size is 2G
*.SGA_MAX_SIZE=1100M
*.SGA_TARGET=1024M
*.DB_CACHE_SIZE=512M
*.PGA_AGGREGATE_TARGET=256M
*.UNDO_MANAGEMENT=AUTO
ctrl+s to save in windows, presss Esc type :wq to save in linux
STEP 3. Connect as DBA and Issue below query to create spfile (dynamic update)
connect /as sysdba
create spfile from pfile;
if you get ORA-32002: cannot create SPFILE already being used by the instance then please
shutdown oracle using below query
shut immediate;
and then try,
connect /as sysdba
create spfile from pfile;
on success you will receive file created message.
if any other error shows please check initorcl.ora file that parameter which you added
previously
STEP 4. Please then startup the oracle using below query
startup
if everything goes well oracle started successfully with above settings
Note: Please ensure you are logged as ORACLE user to connect as DBA.

Please Check Require Tablespaces Size and Disk Space Here: Size Estimator
PRECHECK LIST
Scenario
CHECK 1 : MIN FREE DISKSPACE is
DUMP FILESIZE i.e. If 100 GB dumpfile
need to be imported, harddisk MUST have
minimum 100GB
Solution
Contact System Administrator to add required
disk space
Procedure : Before dump data into database
check available disk space
Linux: df -lh
Windows: du -skh
CHECK2: 2GB FREE TEMP TABLESPACE
is MINIMUM REQUIREMENT
Procedure : check used & available space of
temp tablespace using following query
select bytes_used/1024/1024 Used,
bytes_free/1024/1024 Free from
v$temp_space_header;
if available temp space is = zero
1. To Clear temp space do following
CREATE TEMPORARY TABLESPACE
temp01 TEMPFILE 'path' SIZE 2048M
AUTOEXTEND ON NEXT 100M MAXSIZE
UNLIMITED EXTENT MANAGEMENT
LOCAL UNIFORM SIZE 16M;
PATH: please mention the path to place a file i.e
'e:\oradata\temp02.dbf' in above query
PATH: Please mention the path to place a file i.e
'/home/oracle/app/product/oradata/tepm02.dbf'
in above query
ALTER DATABASE DEFAULT TEMPORARY
TABLESPACE temp01;
CHECK3: DUMP FILE SIZE EQUAL
USERS TABLESPACE SIZE is MINIMUM
REQUIREMENT ADD DATAFILES WITH
AUTOEXTEND
Procedure : To Check used & available space of
USERS tablespace
Free space in USERS:
select tablespace_name, sum(bytes)/1024/1024
FREE from dba_free_space group by
tablespace_name having tablespace_name =
'USERS';
drop tablespace temp including contents and
datafiles;
To Add more free space or required space in
USERS tablespace
ALTER TABLESPACE USERS ADD
DATAFILE 'path' SIZE 2048M AUTOEXTEND
ON NEXT 200m MAXSIZE UNLIMITED;
PATH: please mention the path to place a file i.e
'e:\oradata\users02.dbf' in above query
PATH: Please mention the path to place a file i.e
'/home/oracle/app/product/oradata/users02.dbf'
in above query
USED space in USERS

select a.name, a.bytes/1024/1024 USED from
v$datafile a, v$tablespace b where b.ts# = a.ts#
and b.name = 'USERS';
if free is zero or required space > free space
CHECK4: 5GB FREE UNDO TABLESPACE
is MINIMUM REQUIREMENT
Procedure: To Check Used and Available space
of UNDO tablespace
Free space in UNDO:
select tablespace_name, sum(bytes)/1024/1024
FREE from dba_free_space group by
tablespace_name having tablespace_name =
'UNDOTBS1';
USED space in UNDO:
To Add more free space or required space in
UNDO tablespace
ALTER TABLESPACE UNDOTBS1 ADD
DATAFILE 'path' SIZE 2048M AUTOEXTEND
ON NEXT 200m MAXSIZE UNLIMITED;
PATH: please mention the path to place a file i.e
'e:\oradata\undotbs02.dbf' in above query
PATH: Please mention the path to place a file i.e
'/home/oracle/app/product/oradata/undotbs02.db
f' in above query
select a.name, a.bytes/1024/1024 USED from
v$datafile a, v$tablespace b where b.ts# = a.ts#
and b.name = 'UNDOTBS1';
if free is zero or required space > free space
CHECK5: 3 REDO Log file each 500MB is
MINIMUM REQUIREMENT
Procedure: Check REDO log file size
select bytes/1024/1024 MB from v$log;
if SIZE of MB = 50MB then add more redo log
file
Create 3 REDO log file with 500MB
alter database add logfile ('path','path','path') size
500m;
alter system switch logfile;
PATH: please mention the path to place a file i.e
'e:\oradata\redo5.log' in above query
CHECK6: ALL DATAFILES
AUTOEXTEND ENABLED
Procedure:
select
file_name,tablespace_name,bytes/1024/1024,AU
TOEXTENSIBLE,status from dba_data_files
order by tablespace_name;
PATH: Please mention the path to place a file i.e
'/home/oracle/app/product/oradata/redo5.log' in
above query
As i mentioned procedure will create datafile
with autoextend option when you add new
datafile to tablespaces.
Creating USERS Tablespace with autoextend
enable:
CREATE TABLESPACE USERS01 ADD
DATAFILE 'path' SIZE 2048M AUTOEXTEND
ON NEXT 200m MAXSIZE UNLIMITED
EXTENT MANAGEMENT LOCAL;
ALTER DATABASE DEFAULT TEMPORARY
TABLESPACE USERS01;
PATH: please mention the path to place a file i.e

'e:\oradata\users01.dbf' in above query
CHECK7: Do monitor size of temp, undo
and users tablespace while patch executions
running on. If require increase or resize
tablespace size to avoid space errors.
Procedure: Query to find free and used space in
tablespace in SQL * plus using mentioned
procedure above.
Based on DUMP file size and for patch
operations
PATH: Please mention the path to place a file i.e
'/home/oracle/app/product/oradata/users01.dbf'
in above query
Add datafiles in USERS tablespace, Increase
UNDO Tablespace, TEMP tablespace
Follow above procedure to add space in
appropriate tablespace
if dump size is 100GB then create 5 datafiles
with minimum of 2G each datafile will grow
upto 32GB with unlimited option which is
enough to complete the process
Note: ORACLE XE user data limited 4GB you can't extend space like you do in orcl database. 1
datafile with size of 4GB is suggested in ORACLE XE
Knowledge:
1. Use tablespace other than system and sysaux tablespace to store users data. Verify the
default tablespace & temp tablespace using below query
select property_name,property_value from database_properties where property_name
like '%TABLESPACE';
2. Place user datafiles in seperate hardisk or partiation.
3. Use recommanded parameters settings and on load basis reset or increase value of
parameters
4. Large DML (insert,update and delete) operations require more UNDO tablespace. Increase
the size of UNDO tablespace to avoid space errors.
5. Sorting (group by, order by, having) operations require more Temp tablespace. Increase the
size of TEMP tablespace to avoid space errors.
6. As per dump file size add require datafiles to USERS tablespace. Each datafile can have
max value of 32768 MB (32GB) to avoid space errors. Before add datafiles in USERS
tablespace do check available disk space in the appropriate directory.
Example: if dump file size is 140GB add 5 datafiles in USERS tablespace and each datafile
value 32768
7. At lease have 3 members and 2 group totally 6 redo log files for better log switch operations
and make sure each 500MB
8. Verify with alert log and trace file for error cause and do report immediately to fix issue.