Hi, All, 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?? Mit freundlichen Grüßen Frank Schmitz config: 64-bit: tyan k8s with 2 amd opteron (246) 2 GHz 2GB RAM lsi megaraid u320 (64 MB) 4 drives 35 GB 10000rpm raid 10 ( means 2 x 2 drives raid 0, then raid 1) SuSE 9.0 x86_64; ext3, 32-bit: dual xeon 2 GHz lsi megaraid u320 (64 MB) 4 drives 35 GB 7200rpm raid 10 SuSE 8.2, ext3