Thanks Peter. I saw cpu was shooting much higher. I am not sure if
frequent GCs are caused by improperly sized generations. I'd like to get
some tunning tips, or good document about Cassandra tuning.
Daning
On 09/22/2011 12:23 PM, Peter Schuller wrote:
We are testing Cassandra with pretty big load, I saw frequent GCs in the
log, Do you have suggestion about how to reduce them?
Do you have any actual problem that you are observing?
Frequent young-generation GC:s (ParNew) are expected. If you want to
cut down on the length of them you may want to change the JVM settings
in cassandra-env.sh to use a smaller young-gen, but that will probably
cause overall GC cost to go up as more data is promoted into old gen.
