Oracle Linux 7 Beta Released

Oracle has announced that the initial beta build of Oracle Linux 7.0,a distribution built from source for
Red Hat and enhanced with an “unbreakable” Linux kernel and now it’s Ready for your Testing.

  • RHEL 7 Will now format drives with the XFS filesystem by default.
  • enabling volumes of up to 500TB in size.
  •  if you prefer the older ext4 filesystem it’s now supports 50TB volumes. 
  • improves support for large-scale enterprise storage arrays.
  • provides new tools for managing heterogeneous storage.
  • New Version of SAMBA 4.1.
You Can Download it From Here.
Thank you
Osama mustafa

Enterprise manager Performance Hub (Real Time) 12c

Enterprise manager express is 

SQL> drop user osama cascade ;
User dropped.

SQL> create user osama identified by osama;
User created.

SQL> grant select any table to osama;
Grant succeeded.

SQL> grant select any dictionary to osama ;
Grant succeeded.

SQL> grant create session to osama;
Grant succeeded.

SQL> conn osama/osama ;

SQL> EXEC  DBMS_SQL_MONITOR.BEGIN_OPERATION (‘My_First_JOB’, forced_tracking => ‘Y’);
BEGIN DBMS_SQL_MONITOR.BEGIN_OPERATION (‘My_First_JOB’, forced_tracking => ‘Y’); END;
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00221: ‘BEGIN_OPERATION’ is not a procedure or is undefined
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

to avoid this error :

SQL> VAR myjob_id NUMBER;

SQL> EXEC :myjob_id := DBMS_SQL_MONITOR.BEGIN_OPERATION (‘My_First_JOB’, forced_tracking => ‘Y’)

PL/SQL procedure successfully completed.

myjob_id : variable
My_first_Job : Job name.

Now Check Enterprise manager express Page : 

if you check the second picture you will see if you don’t stop the sql_monitor the Job will still running

PL/SQL procedure successfully completed.

Thank you 
Osama Mustafa

Enable Enterprise Express for Database 12c

Oracle Database 12c comes with new feature called Enterprise manager 12c express, this new enterprise manager control Database 12c using GUI , manager storage , performance , user, roles, accounts and others new features added , No command to start or shutdown EM 12c express by default when you start/shutdown database it will be up/down.

  • export ORACLE_SID
  • Make sure listener is up and database is registered.

sqlplus / as sysdba
SQL> show parameter dispatcher ;
———————————— ———– ——————————
dispatchers     string (PROTOCOL=TCP) (SERVICE=db12cX

  • Configure HTTP PORT 

SQL> exec DBMS_XDB_CONFIG.setHTTPPort (8080);

Check the below pictures that describe EM Express :

DBMS_XDB.setHTTPPort is deprecated

Thank you
Osama mustafa

Instance Caging

Instance Caging

Sometimes When you are doing some testing on one machine and have more than one instance with limited hardware resource , Oracle let control that resource by caging its new feature in 11g its method to cage or bound the instance to use a certain number of cpu instead to take all available CPU simple way :

Alter system set CPU_Count = 2 

Just as note this method work with Resource Manager so you need to enable it , and create resource manager plan first before doing Instance Caging .

Instance Caging Benefits :

  1. Useful when you are using multiple instance .
  2. Allowing CPU , Resource allocation be done effectively .
  3. Control CPU Consumption of each Instance .

Thank you
Osama Mustafa