Re: linux distro for better pg performance

J. Andrew Rogers wrote:

> Do these features make a difference?  Far more than you would imagine. 
> On one postgres server I just upgraded, we went from a 3Ware 8x7200-RPM
> RAID-10 configuration to an LSI 320-2 SCSI 3x10k RAID-5, with 256M

Is raid 5 much faster than raid 10?  On a 4 disk array with 3 data disks 
and 1 parity disk, you have to write 4/3rds the original data, while on 
raid 10 you have to write 2 times the original data, so logically raid 5 
should be faster.