Topic: Performance & Tuning >> Database Writer / Database Writer I/O salves
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| Title: Database Writer / Database Writer I/O salves |
| Navi |
Posted: Jun 09, 2007 04:11:45 AM |
Total Post: 60
Joined: Jun, 2007
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Hi,
If the buffer cache wait events are strictly related to Database Writer I/O activity, then starting I/O slaves is appropriate.
If the buffer cache wait events are occuring for activities related to internal buffer management then starting multiple Database Writer Process is suitable.
a) Can anyone explain these two statements and internal buffer management.
b) What happens if we use Multiple Database Writers instead of Database Writer I/O salves? |
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 Nand |
| Posted: Jun 11, 2007 04:08:06 AM |  |
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Total Post: 22
Joined: Jun, 2007
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I/O slaves main job is to do I/O on behalf of DBWR. The DBWR continues to do all the DBW related work like gathering of dirty buffers into batch. The writing of the batch is parallelized between the slaves. The slaves only perform I/O.
Nand
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