Thanks , this link is very useful. to add to that, I just found that the "sar -g " command is very helpful, it shows paging requests.
On Thu, Sep 8, 2011 at 9:02 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > What is your bottleneck? > > spyced.blogspot.com/2010/01/linux-performance-basics.html > > On Thu, Sep 8, 2011 at 10:14 AM, Ben Ashton <b...@bossastudios.com> wrote: >> Hi Guys, >> >> I have our multi DC setup running on EC2. >> >> Latency on the connections between the servers is <2ms, monitored >> writes are ~3-4ms, reads are 50 to 2200 ms, normally ~80ms >> >> Is this normal? I know there are some optimisation java guys can do >> with hector, but is there anything I can do on a systems level to >> speed up reads. >> >> Thanks, >> >> Ben >> > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com >
