[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] 100% iowait in domU with no IO tasks.
Hi, This is also a problem we are having on our xen servers, but the iowait is considerably higher. i would like to reduce iowait as much as possible, i see iowait above 70% sometimes... Sincerely, Maarten Op donderdag 8 mei 2008 11:02, schreef Bogdan B. Rudas: > Hi. > > I entered one of our domU tonight and see following problem: > > # iowait -k 5 > > avg-cpu: %user %nice %system %iowait %steal %idle > > 0.00 0.00 0.00 100.00 0.00 0.00 > > Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn > sda1 0.00 0.00 0.00 0 0 > sda2 0.00 0.00 0.00 0 0 > > I check other domU and dom0 on same server - there were high iowait: from > 20% to 50% with few transactions per second and about 0.1-1.5 Mb/sec > storage bandwith usage per domU. This domU have no disk IO at all but show > LA 15 and possible higher. > > We have 6 domU on 8-core server with 7 FUJITSU MBB2147RC SAS HDD on DELL > PERC 5/i RAID controller. > > CentOS 5 > Xen 3.1.0 > Kernel 2.6.21 > > We suffer from this problem for a while on many our xen hosts, it is not a > single-time issue. > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users -- Maarten Vanraes BA NV: IT & Security _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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