Using *top *and looki at *'wa' *value can tell you I/O wait time for each CPU Dont forget to press "*1*" to expand list of CPUs
Tasks: 501 total, 4 running, 497 sleeping, 0 stopped, 0 zombie Cpu0 : 31.9%us, 52.7%sy, 0.0%ni, 15.1%id, *0.0%wa*, 0.0%hi, 0.3%si, 0.0%st Cpu1 : 29.7%us, 7.6%sy, 0.0%ni, 62.1%id, *0.0%wa,* 0.0%hi, 0.7%si, 0.0%st Also, there is handy tool called: *iotop *which can tell how much process writes and read. We can see on our 6Gpbs SATAIII interface with SSD disks, the interfaces is being maxed out with writes at ~500MBs At the end 7.2k disks can be easily maxed out while running a few VMs so no surprise here. Lastly, setup some monitoring for example munin, its quite handy : http://demo.munin-monitoring.org/disk-day.html On Mon, Feb 8, 2016 at 1:58 PM Gokan Atmaca <linux.go...@gmail.com> wrote: > > Are the disk partitions properly aligned to 4k boundary on the host (and > in > > the guests too) ? > > > There are 5 in total server. 32G ram. 2T r1 (soft) disk. > > > On Mon, Feb 8, 2016 at 9:41 PM, Zoltan Frombach <zol...@frombach.com> > wrote: > > Are the disk partitions properly aligned to 4k boundary on the host (and > in > > the guests too) ? > > > > See > > > http://www.ibm.com/developerworks/library/l-linux-on-4kb-sector-disks/index.html > > and this: > > > http://unix.stackexchange.com/questions/247387/check-if-partitions-are-aligned-properly-for-performance > > > > > > On 2/8/2016 8:12 PM, Gokan Atmaca wrote: > >> > >> Hello > >> > >> I use KVM. In a virtual machine "jbd2 dm-0" disk I / O is very > >> increases. It consumes up to 99%. For this reason, slowing down the > >> other virtual machine. What should I do to solve the problem. ? > >> > >> Thanks.. > >> _______________________________________________ > >> CentOS-virt mailing list > >> CentOS-virt@centos.org > >> https://lists.centos.org/mailman/listinfo/centos-virt > > > > > > _______________________________________________ > > CentOS-virt mailing list > > CentOS-virt@centos.org > > https://lists.centos.org/mailman/listinfo/centos-virt > _______________________________________________ > CentOS-virt mailing list > CentOS-virt@centos.org > https://lists.centos.org/mailman/listinfo/centos-virt > -- Mintel Group Limited | 333 West Wacker Drive Suite 1100 | Chicago, Illinois USA 60606 Contact details for our other offices can be found at http://www.mintel.com/office-locations. This email and any attachments may include content that is confidential, privileged or otherwise protected under applicable law. Unauthorized disclosure, copying, distribution or use of the contents is prohibited and may be unlawful. If you have received this email in error, including without appropriate authorization, then please reply to the sender about the error and delete this email and any attachments.
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