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How to do "Multiplexing of Control Files" through spfile ( server parameter file) in Oracle 11g

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Step 1)  To perform "Multiplexing of Control Files" through spfile ( server parameter file)" first we need to create spfile from pfile. Example to create spfile from pfile: -                                       Step 2) Copy the control files in physical location from 'cp' command. Note: - At present, I have 2 control files,  I will add one more Control files in the same location. Example: -  Now you can see from above output control04.ctl file has been physically added successfully under /u01/app/oracle/oradata/prod/control04.ctl location. Step 3)  Now you need to set the same through alter command. a)  first shut down the database                                          b)  Startup (Start the database through spfile) ...
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How to Add, Resize, Drop and Rename of a datafile in Tablespace

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                                       How to Add, Resize, Drop and Rename a datafile in Tablespace In order to create a data file first, need to create a tablespace, To know how to create a tablespace  Click here To demonstrate, I will use USERS tablespace to Add,  Resize, Drop and Rename a data file. First, we can check how many data files are present under USERS tablespace through below command. Command: - select name from v$datafile; We can see from above output only a single data file is present under USERS tablespace. Addition of Datafile: - Command to add a datafile: - alter tablespace users add datafile '/u01/app/oracle/oradata/prod/users02.dbf' size 50m; The new data file has been added to my USERS tablespace. Resize of a Datafile: - Command to resize the datafile: - alter database datafile '/u01/app/oracle/oradata/prod/users02...
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Oracle "Redo log Groups addition/deletion" | Karan Rajpoot

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                    Oracle "Redo log Groups addition/deletion" Step 1) To add redo log group first we will check the log groups, members details, location, and size. Example: - From the above output, we can see we have 3 groups and inside every group, we have 1 member each of size 50 MB and the location is /u01/app/oracle/oradata/karan/ Step 2) Now we will add one group and check the status of that group. Example: - Now again we can check the details of log groups and member. Now the 4th group and a member of 50 MB has been added successfully. Step 3) Now I will add one more member to the 4th log group. Example: - We can see from the above output that in group 4, now 2 members are there. Steps to drop the latest added group and member Note: - We cannot drop CURRENT members as shown in the above output, So I will add a new member in group 3 and then I will drop th...
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