<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#ffffff"> Hi, I'm experiencing similar problem on RHEL6. It's seems to be due to excessive context switches. The same VMs running on RHEL5 (KVM) didn't exhibit this problem. I found this issue described in the following bugzilla case: <a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=645898">https://bugzilla.redhat.com/show_bug.cgi?id=645898</a> When your VMs are running, check: vmstat 1 This supposed to be fixed in RHEL6.1 kernels. Regards, Greg Wojcieszczuk On 05/17/2011 03:30 PM, Dmitry Makovey wrote: <blockquote cite="mid:201105170830.04036.dmitry@athabascau.ca" type="cite"> <pre wrap="">On Thursday, May 12, 2011, Dmitry Makovey wrote: </pre> <blockquote type="cite"> <pre wrap="">Hi everybody, we have some weird problem with EL6 box which serves as a KVM host for 3 VMs currently. It shares the same interface with all 3 VMs (same network). All works, except from time to time machine behaves very slow in console (ok, SSH connection) and it happens only from time to time. We've got vnstat running on that box. There is no sign of network overload so far. Average load never crosses 1 (actually it's in 0.2 neighbourhood) so we're really at loss. Did anybody experience something similar? Any suggestions on where to look? </pre> </blockquote> <pre wrap=""> looking at responses is it safe to assume - nobody ever seen problems described above (which would mean we have to dig into our configuration to be able to spot the problem) </pre> <pre wrap=""> <fieldset class="mimeAttachmentHeader"></fieldset> -- redhat-sysadmin-list mailing list <a class="moz-txt-link-abbreviated" href="mailto:redhat-sysadmin-list@redhat.com">redhat-sysadmin-list@redhat.com</a> <a class="moz-txt-link-freetext" href="https://www.redhat.com/mailman/listinfo/redhat-sysadmin-list">https://www.redhat.com/mailman/listinfo/redhat-sysadmin-list</a></pre> </blockquote> </body> </html>