Thanks for your replies guys. I really appreciate it. @Alain, I use Graphite for backend on top of Grafana. But the goal is to move from Graphite to Prometheus eventually.
I tried to find a direct way of getting a specific Latency metric in average and as Chris pointed out, then Mean value isn't that accurate. I do not wish to use the percentile metrics either, but a single latency metric like the *"Local read latency" *output in nodetool tablestats. Looking at the code of nodetool tablestats, it seems that C* also divides *ReadTotalLatency.Count* with *ReadLatency.Count *to get the latency result. So I guess I will have no choice but to run the calculation on my own via Graphite: divideSeries(averageSeries(keepLastValue(nonNegativeDerivative($env.path.to.host.$host.org_apache_cassandra_metrics.Table.$ks.$cf.ReadTotalLatency.Count))),averageSeries(keepLastValue(nonNegativeDerivative($env.path.to.host.$host.org_apache_cassandra_metrics.Table.$ks.$cf.ReadLatency.Count)))) Does this seem right to you? Thanks! On Thu, May 30, 2019 at 12:34 AM Paul Chandler <p...@redshots.com> wrote: > There are various attributes under > org.apache.cassandra.metrics.ClientRequest.Latency.Read these measure the > latency in milliseconds > > Thanks > > Paul > www.redshots.com > > > On 29 May 2019, at 15:31, shalom sagges <shalomsag...@gmail.com> wrote: > > > > Hi All, > > > > I'm creating a dashboard that should collect read/write latency metrics > on C* 3.x. > > In older versions (e.g. 2.0) I used to divide the total read latency in > microseconds with the read count. > > > > Is there a metric attribute that shows read/write latency without the > need to do the math, such as in nodetool tablestats "Local read latency" > output? > > I saw there's a Mean attribute in > org.apache.cassandra.metrics.ReadLatency but I'm not sure this is the right > one. > > > > I'd really appreciate your help on this one. > > Thanks! > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > >
