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From Ching-Cheng Chen <cc...@evidentsoftware.com>
Subject Re: Meaning of TotalReadLatencyMicros and TotalWriteLatencyMicrosStatistics
Date Tue, 22 Mar 2011 15:44:33 GMT
Just as what it named, it's the total microseconds spent on read operations
so far.

Not average.

Regards,

Chen

Senior Developer, EvidentSoftware(Leaders in Monitoring of NoSQL & JAVA )

http://www.evidentsoftware.com

On Tue, Mar 22, 2011 at 11:11 AM, Jonathan Colby
<jonathan.colby@gmail.com>wrote:

> Hi -
>
> On our recently live cassandra cluster of 5 nodes, we've noticed that the
> latency readings, especially Reads have gone up drastically.
>
> TotalReadLatencyMicros          5413483
> TotalWriteLatencyMicros         1811824
>
>
> I understand these are in microseconds, but what meaning do they have for
> the performance of the cluster?   In other words what do these numbers
> actually measure.
>
> In our case, it looks like we have  a read latency of 5.4 seconds, which is
> very troubling if I interpret this correctly.
>
> Are reads really taking an average of 5 seconds to complete??
>
>
>
>

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