Comment Re:Asynchronous IO - that's what RHAS is for. (Score 1) 767
I've just had a chance to look through the RHAS paper on OTN (Oracle
Technology Network, http://otn.oracle.com)
The main three features of RHAS2.1 as far as Oracle are concerned are;
- The I/O Subsystem has been improved, to include asynchronous I/O, elimination of multiple copies to memory buffers while writing to disk, reducing contention for kernel locks, and numerous IO driver enhancements. This is for both ext2 and raw partitions.
-
Larger SGA for systems with up to 4GB of RAM. RHAS 2.1 comes with two kernels; the default SMP kernel which supports up to 4GB RAM and uses two-level page tables; and the enterprise kernel which supports up to 64GB RAM and requires three-level page tables. This means you can increase the database buffer cache up to a theoretical 62Gb.
-
Improvements to the process scheduler which eliminates some locking problems.
You can download the full document about RHAS and Oracle from
OTN at
http://otn.oracle.com/tech/linux/pdf/9iR2-on-Linu
