Oracle Database Discussions

I have a database on RAC (2 nodes)
Oracle 10g
Linux 3
2 servers PowerEdge 2850

I'm tuning my database with "spotilght". I have alredy this alert

"The Average Redo Write Time alarm is activated when the time taken to write redo log entries exceeds a threshold. "

The serveres are not in RAID5.

How can I improve redo log writer performance?


Unlike most other Oracle write I/Os, Oracle sessions must wait for redo log writes to complete before they can continue processing.
Therefore, redo log devices should be placed on fast devices.

Most modern disks should be able to process a redo log write in less than 20 milliseconds, and often much lower.
To reduce redo write time see Improving redo log writer performance.

See Also:

Tuning Contention - Redo Log Files

Tuning Disk I/O - Archive Writer