top command? st : time stolen from this vm by the hypervisor


On Fri, Apr 26, 2013 at 9:54 AM, Michael Theroux <> 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,


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


On 25/04/2013, at 4:15 AM, Robert Coli <> wrote:

On Wed, Apr 24, 2013 at 5:03 AM, Michael Theroux <> 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