incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Robert Coli <rc...@eventbrite.com>
Subject Re: write load while idle?
Date Thu, 22 Aug 2013 23:18:50 GMT
On Fri, Aug 16, 2013 at 4:46 PM, Keith Freeman <8forty@gmail.com> wrote:

> I have a 3-node cluster running 1.2.8, and with no clients connected (for
> about an hour) opscenter is showing a heartbeat-like pattern for total
> writes in the "Cluster Reads & Writes" panel on the dashboard ranging from
> about 10/sec to 26/sec.  Total reads on the other hand are showing a
> straight line hovering just barely above 0/sec.  There are no compactions,
> etc. (the logs are totally quiet).
>
> Is this normal?  I'm new to cassandra so maybe this is normal but I
> couldn't find an explanation in the docs and it seems pretty high for an
> idle system.
>

That doesn't seem normal to me, but then I don't run Opscenter. Have you
tried turning off OpsCenter to see if it changes?

Also, those writes have to go.. somewhere? If you inspect memtables or
flush, where do you see data being stored or flushed?

=Rob

Mime
View raw message