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From Olivier Mallassi <omalla...@octo.com>
Subject Re: jscv CPU Consumption
Date Mon, 02 Jul 2012 15:59:08 GMT
Thanks for the answer. In fact this is maybe simpler.

We do a lot of inserts and a couple of reads.
- tpstats show us the pending read stage was growing.
- *It seems* there was an issue with one of our request. We have 4 indexed
columns (UT8Type)
First, one of the indexed value was "-----------". we replaced this value
by and empty string and it works better. (running the query in CLI)

Yet, we still observed pending Read Stage after 10 minutes of run (on a
couple of nodes).

Do you have any ideas, advices on how to investigate in more details?

Any help would be appreciate.


On Sun, Jul 1, 2012 at 8:56 AM, Jonathan Ellis <jbellis@gmail.com> wrote:

> Sounds like http://wiki.apache.org/cassandra/FAQ#ubuntu_ec2_hangs to me.
>
> On Fri, Jun 29, 2012 at 1:45 AM, Olivier Mallassi <omallassi@octo.com>
> wrote:
> > Hi all
> >
> > We have a 12 servers clusters (8 cores by machines..).
> > OS is Ubuntu 10.04.2.
> >
> > On one of the machine (only one) and without any load (no inserts, no
> > reads....), we have a huge CPU Load whereas there is no activities (no
> > compaction in progress etc...)
> > A top on the machine show us the process jscv is using all the available
> > CPUs.
> >
> > Is that link to JNA? do you have any ideas?
> >
> > Cheers
> >
> > --
> > ............................................................
> > Olivier Mallassi
> > OCTO Technology
> > ............................................................
> > 50, Avenue des Champs-Elysées
> > 75008 Paris
> >
> > Mobile: (33) 6 28 70 26 61
> > Tél: (33) 1 58 56 10 00
> > Fax: (33) 1 58 56 10 01
> >
> > http://www.octo.com
> > Octo Talks! http://blog.octo.com
> >
> >
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>



-- 
............................................................
Olivier Mallassi
OCTO Technology
............................................................
50, Avenue des Champs-Elysées
75008 Paris

Mobile: (33) 6 28 70 26 61
Tél: (33) 1 58 56 10 00
Fax: (33) 1 58 56 10 01

http://www.octo.com
Octo Talks! http://blog.octo.com

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