top command? st : time stolen from this vm by the hypervisor jason
On Fri, Apr 26, 2013 at 9:54 AM, Michael Theroux <mthero...@yahoo.com>wrote: > Sorry, Not sure what CPU steal is :) > > I have AWS console with detailed monitoring enabled... things seem to > track close to the minute, so I can see the CPU load go to 0... then jump > at about the minute Cassandra reports the dropped messages, > > -Mike > > On Apr 25, 2013, at 9:50 PM, aaron morton wrote: > > The messages appear right after the node "wakes up". > > Are you tracking CPU steal ? > > ----------------- > Aaron Morton > Freelance Cassandra Consultant > New Zealand > > @aaronmorton > http://www.thelastpickle.com > > On 25/04/2013, at 4:15 AM, Robert Coli <rc...@eventbrite.com> wrote: > > On Wed, Apr 24, 2013 at 5:03 AM, Michael Theroux <mthero...@yahoo.com> > wrote: > > Another related question. Once we see messages being dropped on one node, > our cassandra client appears to see this, reporting errors. We use > LOCAL_QUORUM with a RF of 3 on all queries. Any idea why clients would see > an error? If only one node reports an error, shouldn't the consistency > level prevent the client from seeing an issue? > > > If the client is talking to a broken/degraded coordinator node, RF/CL > are unable to protect it from RPCTimeout. If it is unable to > coordinate the request in a timely fashion, your clients will get > errors. > > =Rob > > > >
