I thought that "When installed and configured, Linux does not swap out the JVM" was pretty straightforward.
On Wed, Aug 14, 2013 at 2:36 PM, José Elias Queiroga da Costa Araújo <je...@cesar.org.br> wrote: > Hi Michael, > > In my investigation about Cassandra cache, there is an implementation > off-heap provided to RowCache, > but this implementation is based on ByteBuffer mechanish to allocate native > memory using JNI. > > However, In Datastax Cassandra documentation they say that: > "Installing JNA can improve Cassandra memory usage. > When installed and configured, Linux does not swap out the JVM, > and thus avoids related performance issues." > > So my question is if Cassandra cache implementation is based ByteBuffer, > there is any real reason to install JNA? > > Regards, > > > 2013/8/14 Michael Kjellman <mkjell...@barracuda.com> > >> No- not required, but there is zero reason not to. Keep as much off heap >> as possible. >> >> > On Aug 14, 2013, at 12:13 PM, "José Elias Queiroga da Costa Araújo" < >> je...@cesar.org.br> wrote: >> > >> > Hi all, I have a question. >> > >> > In order to activate cassandra row cache is necessary to have JNA >> > installed? >> > >> > Regards, >> > >> > *Elias.* >> -- Jonathan Ellis Project Chair, Apache Cassandra co-founder, http://www.datastax.com @spyced
