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 >
