Tolga, What kind of hardware do you have? Have you done some tests (with dd perhaps) to see if you are actually getting this type of throughput? Update 2 for RHEL 3 is pretty old. The latest rev of the kernel is -37.ELsmp. You may want to consider updating. Jeremy redhat-list-bounces@xxxxxxxxxx wrote on 10/05/2005 11:49:27 PM: > Hi , > > The below is the iostat output redhat linux 3.0 which shows very large > values for rkB/s field (568785.19 ) > > Reading 568785.19 kB per second! Impossible. > > $uname -a: > Linux koccrmdev 2.4.21-15.ELsmp #1 SMP Thu Apr 22 00:18:24 EDT 2004 > i686 i686 i386 GNU/Linux > > $ cat /etc/redhat-release > Red Hat Enterprise Linux ES release 3 (Taroon Update 2) > > I have oracle running on this server. I can basically regenerate this > pattern easily ,this happens when i disable async. io at oracle part . > > With aio enabled , oracle does not use pread or readv system calls and > i see reasonable values at iostat for the system. > > But when i disable it , iostat shows very high values. > > For clarity , when i get these results , the only user on the system is > > me. > > avg-cpu: %user %nice %sys %idle > 20.83 0.00 68.98 10.19 > > Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s > avgrq-sz avgqu-sz await svctm %util > /dev/sda 127851.85 7748.15 14344.44 879.63 1137570.37 69007.41 > 568785.19 34503.70 79.25 1966.67 12.91 1.22 1851.85 > /dev/sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 > /dev/sda2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 > 0.00 0.00 0.00 0.00 0.00 > /dev/sda3 127824.07 37.04 14118.52 77.78 1135540.74 918.52 567770.37 > > 459.26 80.05 1914.81 13.48 1.30 1851.85 > /dev/sda5 27.78 12.96 18.52 9.26 370.37 177.78 185.19 88.89 > 19.73 2.96 10.67 8.00 22.22 > /dev/sda6 0.00 7698.15 207.41 792.59 1659.26 67911.11 829.63 > 33955.56 69.57 48.70 4.89 4.00 400.00 > > Can this be a redhat bug? > > Kind Regards, > tolga > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list-- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list
