How do I manually create a control file in Oracle 11g?

How do I manually create a control file in Oracle 11g?

Complete the following steps to create a new control file.

  1. Make a list of all datafiles and redo log files of the database.
  2. Shut down the database.
  3. Back up all datafiles and redo log files of the database.
  4. Start up a new instance, but do not mount or open the database: STARTUP NOMOUNT.

What is the maximum table size in Oracle?

You are using a MyISAM table and the space required for the table exceeds what is permitted by the internal pointer size. MyISAM permits data and index files to grow up to 256TB by default, but this limit can be changed up to the maximum permissible size of 65,536TB (2567 − 1 bytes).

How do you check the size of a datafile in Oracle?

The size of the database is the space the files physically consume on disk. You can find this with: select sum(bytes)/1024/1024 size_in_mb from dba_data_files; But not all this space is necessarily allocated.

What is the maximum size of VARCHAR2 in Oracle 11g?

The VARCHAR2 datatype represents variable-length character strings. On most platforms, the maximum length of a VARCHAR2 value is 65535 bytes.

What is the maximum number of datafiles in Oracle?

There is a UNIX kernel limit for the maximum number of open files. There is an absolute Oracle maximum of 65533 files in a database and usually 1022 files in a tablespace.

How do I limit the size of the ODL log?

To limit the size of the ODL log, you can specify: The maximum size of the logging directory. Whenever the sum of the sizes of all of the files in the directory reaches the maximum, the oldest archive is deleted to keep the total size under the specified limit. By default, the log files are rotated when they reach 10 MB.

What is the maximum value of maxdatafiles?

When you issue a “create database” command, the value you specify for maxdatafiles is stored in your Oracle control files. The default value of 32 is usually sufficient, but after Oracle8i there is no downside to using a larger value.

What is the Oracle diagnostic logging format?

Most Oracle Fusion Middleware components write diagnostic log files in the Oracle Diagnostic Logging (ODL) format. Log file naming and the format of the contents of log files conforms to an Oracle standard and, by default, the diagnostic messages are written in text format. ODL provides the following benefits:

How do I Multiplex Control Files in Oracle Database?

Oracle strongly recommends that your database has a minimum of two control files and that they are located on separate physical disks. One way to multiplex control files is to store a control file copy on every disk drive that stores members of redo log groups, if the redo log is multiplexed.

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