Tag: Osama

Check TimeZone Before Upgrades

Posted on by Osama Mustafa in Application
Lot of question Regarding to TimeZone While Upgrade Oracle Database, You have to Check TimeZone When you have Data Or Schedule Job With Timezone info.

There are three Cases I will Describe them later In this article , but First You need to check Timezone

SQL> select version from v$timezone_file;

After Doing That you will Have Number As Output , This Number Should Compare to 4 ( value ) with Three below Cases :
1- Output =  4

You could Contuine with Upgrade without Do anything

2- Output >  4
Actions for the DSTv4 update in the 10.2.0.4 patchset [ID 553812.1]
Updated DST transitions and new Time Zones in Oracle Time Zone File patches [ID 412160.1]

3 – Output < 4 
You have to download utltzpv4.sqlfrom MOS (https://support.oracle.com)
With This Script also you have two case
if script returns no rows, there is nothing that needs to be done. Just proceed with the upgrade.

If script retunrs the detail of columns that contain TZ data which may be affected by the upgrade, then follow document Actions for the DSTv4 update in the 10.2.0.4 patchset [ID 553812.1]

Thank you
Osama Mustafa

Stop Standby Database And Work As Standalone

Posted on by Osama Mustafa in Database
Sometimes you need to disconnect Standby Database, Or even Delete the Configuration And let the primary Is StandAlone Database to do that you have Temporary way or Permanet Way :

 1 – Temporary :

Run the below command in standby Database: 

SQL> alter database recover managed standby database cancel;

2- Permant With The Following Steps :

Run the below command in standby Database:  

SQL> alter database recover managed standby database cancel;

 Shutdown Standby Database.
change the parameters LOG_ARCHIVE_DEST_n/LOG_ARCHIVE_CONFIG (if set).
 Remove tnsnames.ora for standby In primary Database.

Thank you
Osama mustafa

Compare Two AWR/ Different Period

Posted on by Osama Mustafa in Database
Very and Useful Article To learn how to compare between AWR With Different Period

Press the Link Here.

Or

1-Use  DBMS_WORKLOAD_REPOSITORY.CREATE_BASLELINE_TEMPLATE to instruct Oracle to keep the snapshots for (for example) every Sunday.
2- generate comparison reports with the awrddrpt.sql Comparing any Sunday.

Thank you
Osama Mustafa

Moving Undo/Temporary Tablespace

Posted on by Osama Mustafa in Database
To Move these tablespace Easily you can create them By Following the below Steps :

sqlplus '/as sysdba'
 
SQL>CREATE TEMPORARY TABLESPACE 
TEMPFILE '/new_location/.dbf' 
SIZE 64M REUSE AUTOEXTEND ON NEXT 28 MAXSIZE unlimited;
 
SQL>ALTER DATABASE DEFAULT TEMPORARY TABLESPACE 
 
Drop the Old One By Run the Below Command :
 
SQL>DROP TABLESPACE temp INCLUDING CONTENTS AND DATAFILES;
 
 
For Undo Tablespace Check the below Steps:
 
SQL>create undo tablespace 
 datafile '/new_location/.dbf' size 2000m;
 
Make New Tablespace for Database:
 
SQL> alter system set undo_tablespace= undotbs2 ;
 
Drop Old Tablespace:
 
SQL> drop tablespace undotbs including contents;
 
Thank you 
Osama Mustafa

ora-27086 unable to lock file / Alertlog

Posted on by Osama Mustafa in Database
ORA-27086:unable to lock file – already in use
Cause:the file is locked by another process, indicating that it is currently in use by a database instance.
Action:determine which database instance legitimately owns this file.

If you check the above Picture you will there’s two Pmon process for the same instance, So what you do is the follwing

export ORACLE_SID=swf33
export ORACLE_HOME=
sqlplus / as sysdba
Shutdown immediate;

 After shutdown database another process still up use kill -9 OS command to kill it and startup database.

Thank you
Osama Mustafa

Applying Critical Patch Updates (CPU).

Posted on by Osama Mustafa in Database
A Critical Patch Update is a collection of patches for multiple security vulnerabilities. Critical Patch Update patches are usually cumulative but each advisory describes only the security fixes added since the previous Critical Patch Update advisory. Thus, prior Critical Patch Update advisories should be reviewed for information regarding earlier published security fixes.its released on January, April, July &October.

Steps to Apply CPU: 

Pre-Installation:

  1. Shutdown all the instance , and oracle services such as listener. 
  2. ensure $PATH variable.
  3. Download Patchand unzip it.
  4. Use the Opatch like this : opatch napply -skip_subset -skip_duplicate.
  5. Startup databas.

Post-Installation :

  1.  cd $ORACLE_HOME/rdbms/admin
  2. sqlplus / as sysdba
  3. SQL> @catbundle.sql cpu apply
     
     

     

Note : For rac database nothing diffrenece unless you have to shutdown services node by node and patching ( you can patch one node then the other one).

Useful MOS notes :
Introduction To Oracle Database catbundle.sql [ID 605795.1]

 Thank you 
Osama Mustafa

privileges Scripts

Posted on by Osama Mustafa in Scripts
These script made by René Nyffenegger and shared here for knowledge

List user role and privileges :

select
  lpad(' ', 2*level) || granted_role "User, his roles and privileges"
from
  (
  /* THE USERS */
    select 
      null     grantee, 
      username granted_role
    from 
      dba_users
    where
      username like upper('%&enter_username%')
  /* THE ROLES TO ROLES RELATIONS */ 
  union
    select 
      grantee,
      granted_role
    from
      dba_role_privs
  /* THE ROLES TO PRIVILEGE RELATIONS */ 
  union
    select
      grantee,
      privilege
    from
      dba_sys_privs
  )
start with grantee is null
connect by grantee = prior granted_role;

Check System privileges: 

select
  lpad(' ', 2*level) || c "Privilege, Roles and Users"
from
  (
  /* THE PRIVILEGES */
    select 
      null   p, 
      name   c
    from 
      system_privilege_map
    where
      name like upper('%&enter_privliege%')
  /* THE ROLES TO ROLES RELATIONS */ 
  union
    select 
      granted_role  p,
      grantee       c
    from
      dba_role_privs
  /* THE ROLES TO PRIVILEGE RELATIONS */ 
  union
    select
      privilege     p,
      grantee       c
    from
      dba_sys_privs
  )
start with p is null
connect by p = prior c;

Object Privileges : 

select
  case when level = 1 then own || '.' || obj || ' (' || typ || ')' else
  lpad (' ', 2*(level-1)) || obj || nvl2 (typ, ' (' || typ || ')', null)
  end
from
  (
  /* THE OBJECTS */
    select 
      null          p1, 
      null          p2,
      object_name   obj,
      owner         own,
      object_type   typ
    from 
      dba_objects
    where
       owner not in 
        ('SYS', 'SYSTEM', 'WMSYS', 'SYSMAN','MDSYS','ORDSYS','XDB', 'WKSYS', 'EXFSYS', 
         'OLAPSYS', 'DBSNMP', 'DMSYS','CTXSYS','WK_TEST', 'ORDPLUGINS', 'OUTLN')
      and object_type not in ('SYNONYM', 'INDEX')
  /* THE OBJECT TO PRIVILEGE RELATIONS */ 
  union
    select
      table_name p1,
      owner      p2,
      grantee,
      grantee,
      privilege
    from
      dba_tab_privs
  /* THE ROLES TO ROLES/USERS RELATIONS */ 
  union
    select 
      granted_role  p1,
      granted_role  p2,
      grantee,
      grantee,
      null
    from
      dba_role_privs
  )
start with p1 is null and p2 is null
connect by p1 = prior obj and p2 = prior own;
 
 Thank you 
Osama Mustafa

Zombie process

Posted on by Osama Mustafa in Operating system
Zombie process is an inactive computer process,according to wikipedia article, “…On Unix operating systems, a zombie process or defunct process is a process that has completed execution but still has an entry in the process table, allowing the process that started it to read its exit status. In the term’s colorful metaphor, the child process has died but has not yet been reaped…”

Find zombie by :

# ps aux | awk '{ print $8 " " $2 }' | grep -w Z

 after that use kill -9  PID

Thank you
osama mustafa

Useful Linux Commands For DBA

Posted on by Osama Mustafa in Operating system 
Show Routing Table :
 
netstat -r

Check ORA errors in the Logs:

grep ^ORA- *log |cut -f2 -d"-"|cut -f1 -d:|awk '{print "ORA-" $1}'|sort -u
Inzip CPIO Files :
 
cpio -idmv <

 Sort Files By Size :

ls -l |sort -k 5

Find Command archive and move to another Folder :

find ./ -name "*.arch" -mtime +1 -exec mv {} /u01/;

Find Command archive and Remove it:

find ./ -name "*.ARC" -mtime +1 -exec rm {} \;

Find Command with Zip :

find ./ -name "*.ARC" -mtime +1 -exec gzip {} \;

 Find Command With List :





 find ./ -name “*.ARC” -mtime +1 -ls  


Thank you
Osama Mustafa



	

	

	




	
	

		
Check Default Tablespace For User and Change it
				

					Posted on  by Osama Mustafa in Database				


				

	

		
Check the Below Demo how you can check tablespace for specific User and how can  you change it


Create New User Without Determine which Tablespace: 


SQL > Create User test Identified by test ;


Check TableSpace for Test User:


 SQL> select default_tablespace from dba_users where username=’TEST’;


DEFAULT_TABLESPACE
——————————
USERS


Change TableSpace For Test User :


Solution One : Change Default TableSpace For Database By :


 SQL> alter database default tablespace ;

Solution two : define Tablespace When Creating User


 SQL > create user Test identified by Test default tablespace USER


Thank you
Osama Mustafa