Constantly changing data blocks

Hello
If the data blocks in the buffer constantly updated such that they never reach the list less used of LRU, then when they will be written on the disc?

To ensure that DBWR writing all updated the pads the following is appropriate:

1 STOP (NORMAL or IMMEDIATE)
2 ALTER DATABASE BEGIN BACKUP
3. CHANGE THE SYSTEM CHECKPOINT
4. ALTER SYSTEM SWITCH LOGFILE - Modified written DBWR buffers "lazily", so the order is returned, before even that all modified buffers are written to disk
5 ALTER TABLESPACE BEGIN BACKUP - only Tablespace tbsname is controlled, not the whole instance
6 DELETE or TRUNCATE the table - only buffers of the table (and index) are controlled
7 checkpoint segment emitted by a parallel query - only segment buffers are controlled
8. control initiated by direct route segment point series read implemented at level 11 g - only segment buffers are controlled (see URL later added by Joel (jgarry) in the comments)

Hemant K Collette

Published by: Hemant K grapple on January 11, 2011 11:13

Tags: Database

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