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ORA-00354: corrupt redo log block header

ORA-00354: corrupt redo log block header Issue : Normal users could not connect to database. It messaged ORA-00257 :Connect Internal Only until freed. Whenever you try to archive the redo log it...

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Difference between Raw Device and Block Device

Difference between Raw Device and Block Device A RAW Device read/write 0 or more bytes, in a stream and can be opened using Direct I/O. RAW devices can be faster for certain applications like databases...

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How to Boot from SAN

  Information: This is a general overview of the steps needed to install an OS as boot from SAN.  You should consult your SAN and HBA configuration for your specific configuration requirements.  Not...

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Fragmentation Report

col tsname  format         a16 justify c heading ‘Tablespace’ col nfrags  format     999,990 justify c heading ‘Free|Frags’ col mxfrag  format 999,999,990 justify c heading ‘Largest|Frag (KB)’ col...

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Silent Installation of Oracle

===== Windows Silent Installation - Create staging area for your installation by copying the installation software to central location. mkdir C:\download - Start the setup.exe in record mode to...

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How to move profiles from one database to another database

How to move SQL Profiles from one Database to another Database 1- Create the staging table SQL> SYS@DB1 SQL> BEGIN DBMS_SQLTUNE.CREATE_STGTAB_SQLPROF ( table_name => ‘SQL_PROFILES’,...

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basic rman commands

1. All Backup Sets, Backup Pieces, and Proxy Copies To list all backup sets, backup pieces, and proxy copies: RMAN> list backup; 2. Expired Backup List We can also specify the EXPIRED keyword to...

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Disk signature of disk 0 is equal to the disk signature of disk 1

Disk signature of disk 0 is equal to the disk signature of disk 1 This error occurred on one of the virtual machines on the ESX environment. It probably also caused another error a bit further up in...

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How to Deploy Remote Desktop Connection Broker with High Availability

  You have very good Document Provided in Microsoft Technet http://technet.microsoft.com/en-us/library/ff686148%28v=WS.10%29.aspx

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How to convert VDI to VMDK file

How to convert VDI to VMDK file Download qemu-img.exe file from the web use the following command to convert .vdi file to .vmdk qemu-img.exe convert -O vmdk opennebula-4.0-sandbox.vdi...

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Consolidated AWR report for RAC

11gR2 consolidated AWR report for RAC awrgrpt.sql This is a cluster wide awr report, so you can see a lot of the information from all the nodes in the same section, and you can also see aggregated...

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What is Oracle RAC Node Eviction

What is Oracle RAC Node Eviction One of the most common and complex issue is node eviction issue. A node is evicted from the cluster after it kills itself because it is not able to service the...

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Logical IO should also addressed more than Physical IO

Please read the following document to understand more on the same. http://www.hotsos.com/e-library/abstract.php?id=7  

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How to change SQL Prompt in Oracle

Take a backup of glogin.sql in ORACLE_HOME\sqlplus\admin Now Edit glogin.sql and add these lines SET TIME ON SET TIMING ON set sqlprompt "_user '@' _connect_identifier > " Now try to connect using...

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How to configure DGMGRL

DG broker does not have the ability to create standby and is used for managing the dataguard configuration. Pri db_unique_name    =    ‘TESTPRI’ DG db_unique_name    =    ‘TESTDG’ Configuration(any...

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Tablespace Growth Monitoring Script

  Tablespace Growth Monitoring Script column “tablespace_name” heading “Tablespace | Name” format a20 column “FileCount” heading “File | Count” format 999999 column “Size(MB)” heading “Size | (MB)”...

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How to find who Truncated the Table

SQL> conn / as sysdba Connected. SQL> EXECUTE DBMS_LOGMNR.ADD_LOGFILE( LOGFILENAME =>’+DG1/mudhalvan/onlinelog/group_1.003.345746983′); PL/SQL procedure successfully completed. SQL> EXECUTE...

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What is Redo, Rollback and Undo?

  Redo : The redo log records all changes made to data, including both uncommitted and committed changes. In addition to the online redo logs Oracle also stores archive redo logs. All redo logs are...

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Oracle Data Guard Network Latency

Sample Implementation 1: Maximum Availability Mode Data Guard Maximum Availability – SYNC Continous redo shipping, validation and apply up to 10ms network latency – approx 60 miles Sample...

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What is rolling upgrade

It is a new ASM feature from Database 11g.ASM instances in Oracle database 11g release(from 11.1) can be upgraded or patched using rolling upgrade feature. This enables us to patch or upgrade ASM nodes...

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