On Wed, Oct 05, 2011 at 02:28:30PM -0400, Alex wrote: > > Load on the server is regularly above 20, yet the processors > generally are idle and the host is still responsive. That's completely normal for an email server running spamassassin, in my experience, and has nothing to do with libvirt. IME, the issue is DNS lookups, which spamassassin and the RBLs it uses make *heavy* use of. Run a caching DNS on localhost with fairly agressive caching (i.e. go ahead and have it ignore TTLs and keep everything for at least 5 minutes) and I expect that you'll find that problem being rapidly resolved. -Robin
