On Fri, Jul 16, 2004 at 12:24:02PM +0200, Frank Schmitz wrote:
i have performance difficulties with a dual-opteron system : there is a scsi - megaraid controller with 4 harddrives configured as a raid 10. our database writes huge temp-files (up to 4GB). the feeling was - it`s slow. So i compared it with a similar 32-bit system: the 64-bit needed twice (!) the time to copy a 4GB -asciifile than the 32-bit system. i changed the raid-parameters (writeback to write through and some more) - no effect i changed the modules megaraid to megaraid2 - no effect
what can i do to get it faster??
Does the 32bit system use an megaraid too? megaraids are always quite slow compared to other RAID controllers. I also don't know of a way to make them faster. Software RAID with a simple SCSI controller is usually much faster. -Andi