Which SCHED_ for DB server

[Norberto Meijome]

Holger Kipp wrote:
> Hello,
> 

>>4 x SATA 150 drives, 90% of it RAID5 with gvinum.
> 
> 
> I do not know your applications, but if writing to disk is an issue:
> 
> - WAL-files should be written to physically separated disks.
sorry, what do you mean by WAL-files

> - Write performance to RAID5 is not very good (tm).
>   This is both with softraid and with hardware raid, although
>   those raid controllers with 64MB or higher (+batterybackup)
>   might increase the visible performance if only a few processes
>   generate disk-i/o-load.
> - ATA is not good for production - better use SCSI.

I hear you... Budget reasons forced me to use this. I could go RAID10, 
but I'd lose about 200 GB which I probably will need.

thanks