8x is pretty normal for JVM and bookkeeping overhead with the CLHCP. The SerializedCacheProvider is the default in 1.0 and is much lighter-weight.
On Thu, Jan 12, 2012 at 6:07 PM, Todd Burruss <bburr...@expedia.com> wrote: > I'm using ConcurrentLinkedHashCacheProvider and my data on disk is about 4gb, > but the RAM used by the cache is around 25gb. I have 70k columns per row, > and only about 2500 rows – so a lot more columns than rows. has there been > any discussion or JIRAs discussing reducing the size of the cache? I can > understand the overhead for column names, etc, but the ratio seems a bit > distorted. > > I'm tracing through the code, so any pointers to help me understand is > appreciated > > thx -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
