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Note: All the posts are based on practical approach avoiding lengthy theory. All have been tested on some development servers. Please don’t test any post on production servers until you are sure.

Tuesday, March 15, 2011

How much DB undo generated

Create Or Replace Force View Sys.Av_db_undo_generated (Rundate,
                                                       "REDO PER DAY (MB)"
   Select   Trunc (Completion_time) Rundate,
            To_char (Trunc (Completion_time), 'DAY') Day, Count (*) Logswitch,
            Round ((Sum (Blocks * Block_size) / 1024 / 1024)
                  ) "REDO PER DAY (MB)"
       From V$archived_log
   Group By Trunc (Completion_time)
   Order By 1 Desc;

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