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Monitoring AIX
On AIX – nmon on AIX can be used to monitoring a machine (CPU, Memory, Network traffic, I/O, top processes,… READ MORE
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Why a 99%+ Database Buffer Cache Hit Ratio is Not Ok – by Cary Milsap
The following article by Cary Milsap talks about “Why a 99%+ Database Buffer Cache Hit Ratio is Not Ok” by… READ MORE
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RMAN – incremental backup
RMAN command to create level 0 backup which is needed before running of incremental backup RMAN> BACKUP INCREMENTAL LEVEL 0… READ MORE
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How to add or drop online-redo logs?
Below are the steps on how to add a new online redo-group. It could be of the same size as… READ MORE
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Shirking sharepoint database
We had an issue the other day when one of the Sharepoint database logs became extremely large as the server… READ MORE
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How to fix issue when the online redo logs are missing?
If for some reason the online redo log were lost or when cloning the copy of shutdown database you don’t… READ MORE
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Create a database manually on windows in 11g?
-- Step 1) set up environment variables needed (ORACLE_HOME, ORACLE_SID and add ORACLE_HOME\bin to PATH) set ORACLE_HOME=e:\oracle\11g\product\11.2.0.1 set PATH=%ORACLE_HOME%\bin;%PATH% set… READ MORE
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How to create/drop AWR baseline?
To create a baseline of performance of the system, one create a baseline and used for later comparisons. If a… READ MORE
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How to drop snapshots?
-- drop snapshot, it will not generate an error if the snap id is out of range SQL> EXEC dbms_workload_repository.drop_snapshot_range(low_snap_id=>1,… READ MORE
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SQL by high physical I/O
-- Shows SQL statements currently in shared pool with high physical I/O, it sorts by the high I/O first SELECT… READ MORE
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Using DBMS_ADVISOR to advice about UNDO tablespace from AWR
declare task_id number; name varchar2(100); descr varchar2(100); obj_id number; -- get the min and max snap id from AWR CURSOR… READ MORE
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Resumable timeout explained
One can make Oracle suspend a session if it runs out a free space by enabling resumable timeout. This can… READ MORE
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How to check if RMAN catalog is installed for a database?
There are couple of ways to determine if RMAN database is registered with a catalog. Using RMAN when you connect… READ MORE
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How to generate a list of exceptions generated due to constraint violations?
The following shows how exceptions can be captured. — Create exceptions table SQL> @?/rdbms/admin/utlexcpt.sql Table created. SQL> desc exceptions; Name… READ MORE
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How to list current active roles for a user in a session?
Using SESSION_ROLES it will retrieve the current roles that are active for a user in a session. Example: SQL> connect… READ MORE
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DEFAULT role explained
It seems at times when roles are assigned they are not assigned as DEFAULT role to a user. The reason… READ MORE
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Global temporary tables
— Global temporary table which keeps records till session create global temporary table temp1( year number ) on commit preserve… READ MORE
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The CHECK_POLICY and CHECK_EXPIRATION options cannot be turned OFF when MUST_CHANGE is ON
When a user account is created on SQLServer on 2005 with user account set to “Enforce password policy” and “Enforce… READ MORE
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How to get current session id, process id, client process id?
SQL> select b.sid, b.serial#, a.spid processid, b.process clientpid from v$process a, v$session b where a.addr = b.paddr and b.audsid =… READ MORE
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Changing Oracle password in 11g using ALTER USER IDENTIFIED BY VALUES
In 11g the Oracle the hash password is no longer stored in DBA_USERS, it is stored in SYS.USER$ table in… READ MORE
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Oracle passwords in 11g
In 11g Oracle supports password to be case sensitive. But the password can be case insensitive depending on value of… READ MORE
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How to fix when receiving ORA-02082 when trying to drop a database link?
The issue occurs when there is a db link which is a loop back database link i.e. points to itself… READ MORE
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Information on “RESOURCE_LIMIT” parameter
“RESOURCE_LIMIT” parameter is used to enable/disable “KERNEL” resource type profiles. Password parameters are part of profiles but they are controlled… READ MORE
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