incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <jbel...@gmail.com>
Subject Re: reads are slow
Date Tue, 23 Feb 2010 17:35:05 GMT
are you i/o bound?
http://spyced.blogspot.com/2010/01/linux-performance-basics.html

On Tue, Feb 23, 2010 at 11:33 AM, kevin <kevincastiglione@gmail.com> wrote:
> to load 100 columns of a super column it takes over a second. how to improve
> this performance.
>
>
> i am using cassandra 0.5 version.
>
> output of nodeprobe info
> 29814395632524962303611017038378268216
> Load             : 9.18 GB
> Generation No    : 1266945238
> Uptime (seconds) : 638131
> Heap Memory (MB) : 47.55 / 10237.94
>
> the full config file is here
> http://pastie.org/838916
>
> I have given 10GB RAM in cassandra.in.sh.
>         -Xmx10G \
> i have increased KeysCachedFraction to 0.04. i have two different drives for
> commitlog and data directoy.
> i have about 3 million rows.
> what can i do to improve read speed?
> thanks a lot!
>

Mime
View raw message