Oracle | DBMS

Oracle DBMS_DBCOMP Version 21c

General Information

Library Note

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Purpose Assumes that a primary database and one or more Data Guard physical standby databases are deployed. The databases should be at least mounted or open before block comparison is run.

Logical standby databases, Far Sync instances, and cascaded standbys cannot be the target database.

AUTHID CURRENT_USER

Dependencies

STANDARD (only)

Documented Yes: Packages and Types Reference

First Available 12.2

Security Model Owned by SYS with EXECUTE granted to SYSBACKUP and SYSDG

Source {ORACLE_HOME}/rdbms/admin/dbmsdbcomp.sql

Subprograms

DBCOMP

Compares database blocks on primary to standby(s) dbms_dbcomp.dbcomp( datafile IN VARCHAR2, outputfile IN VARCHAR2, block_dump IN BOOLEAN := FALSE);

exec dbms_dbcomp.dbcomp('ALL', '/home/oracle/lost_write_check.txt', TRUE);

      

      -- in a separate SQL*Plus session

      SELECT target_desc, sofar, totalwork 

      FROM v$session_longops

      WHERE opname = 'BlockCompare';

      

      TARGET_DESC                      SO FAR  TOTALWORK

      ----------------------------- --------- ----------

      Compared Blocks                  367104     403142

      Lost Writes                           0          0