Jesse, Thanks for your quick response.
Which version would you recommend upgrade to? As you know, this is our production environment, stability is the first priority. May I upgrade the userspace programs only? We might not be able to upgrade kernel module as replacing kernel module may require a server reboot and we couldn't stop the running service on it. Many thanks! Jian Qiu On Tue, Aug 20, 2013 at 12:29 AM, Jesse Gross <[email protected]> wrote: > On Mon, Aug 19, 2013 at 6:39 AM, Jian Qiu <[email protected]> wrote: > > Hi, > > > > We deployed openvswitch 1.4.6 on CentOS 6.4 in our production > envioronment. > > OVS were used to bridge KVM VMs. > > > > Recently, we found some VMs lost network connections randomly. When the > > event happened, we login into the VMs through VNC console and found the > ARP > > tables were full of incomplete entries. It seemed that the ARP packets > > in/out of the VMs were being dropped. > > > > We checked the ovs-vswitchd message logs when the network disconnection > > happened, we found most of the messages complained high CPU usage of > > ovs-switchd and "dropped log messages". (Samples are attached at the end > of > > email) > > > > I'm writing the email for your kind help. > > > > 1. Did the "dropped log messages" cause the VMs losing network > connections? > > No, it just means that the log messages have been rate limited. > > > 2. Is there any quick fix to this issue except replacing the OVS kernel > > module as we couldn't reboot the hypervisor? > > Not a quick fix but newer versions of OVS will likely improve your > performance. >
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