On Tue, Feb 23, 2010 at 11:33 AM, kevin <kevincastiglione@gmail.com> wrote:
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!

Since 0.5 doesn't have row caching, 10G is probably too much to give the JVM and is hampering the OS cache.  Try between 2-6GB instead and see if that helps.