| September 09, 2007 10:32:15 |
#6 |
| priyanka |
Member Since: Visitor Total Comments: N/A |
RE: While taking hot backup (begin end backup) what w...
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When the database is taken in backup mode the checkpoint takes place and the datafile header gets frozen
As the checkpoint takes place the database writer writes all the blocks from database buffer cache to datafiles.The same blocks are also written from the redo log buffer in the redo log files. So the archive log generation becomes high
OS blocks differ from oracle blocks so there can be fractured block that needs recovery. This is the reason why all the blocks are written in the redolog files when the database is in backup mode
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