On 2010-02-09 18:15, Fernando Gleiser wrote: > Every time we try to copy some large file to the storage-based file system, > the disk utilization see-saws up to 100% to several seconds of inactivity, to > climb up again to 100% and so forth. > Here are a snip from the iostat -kx 1: > > Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz > avgqu-sz await svctm %util > sdb1 0.00 133811.00 0.00 1889.00 0.00 513660.00 543.84 > 126.24 65.00 0.47 89.40
The iostat output looks good to me for the RAID setup you have. I'd look for the problem in a different place: note the output of cat /proc/sys/vm/dirty_background_ratio and try echo 1 > /proc/sys/vm/dirty_background_ratio whether it helps. Andrzej _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
