- Data is transfered directly from the disk to the application buffer, bypassing the file buffer cache hence avoiding double caching (filesystem cache + Oracle SGA)
- Emulates a raw-device implementation
- Give a faster access to the backend disk and reduce the CPU utilization
- Disable the inode-lock to allow several threads to read and write the same file
Wednesday, July 4, 2012
Avoid double caching to improve disk I/O performance in Oracle
If Oracle data are stored in a Filesystem a Concurrent IO mount option can improve performance ...
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