Hello, In addition to my previous comment.
Regarding the NUMA integration with Cassadra, we configured NODE-1 only utilize the resources. However after enabling this functionality, we noticed on NODE-1 Private allocated to 4G . What we did << #tail -n1 /etc/cassandra/conf/cassandra-env.sh JVM_OPTS="$JVM_OPTS -XX:+UseNUMA" #grep -A3 numactl /usr/sbin/cassandra # If numactl is available, use it. For Cassandra, the priority is to # avoid disk I/O. Even for the purpose of CPU efficiency, we don't # really have CPU<->data affinity anyway. Also, empirically test that numactl # works before trying to use it (CASSANDRA-3245). #NUMACTL_ARGS="--interleave=all" ===>>> Here we commented this parameter. After triggering below command #/usr/bin/numactl --cpunodebind=1 -- /usr/sbin/cassandra -p /run/cassandra/cassandra.pid We noticed on NODE-1 Stack,Heap,Huge values changed to null . We need to know why Private on NODE-0 utilizing memory even after we routed traffic to NODE-1? Please let us know do we miss anything here? Can anyone please explain what below parameters will do as per numactl output. --- *Private* *Stack* *Heap* *Huge* *--* // # numastat -s cassandra Per-node process memory usage (in MBs) for PID 5732 (java) Node 0 Node 1 Total --------------- --------------- --------------- Private 4205.57 4570.72 8776.30 Stack 0.00 210.09 210.09 Heap 0.00 32.59 32.59 Huge 0.00 0.00 0.00 ---------------- --------------- --------------- --------------- Total 4205.57 4813.40 9018.98 Env, RHEL7.3 3.10.0-514.2.2.el7.x86_64 cassandra30-3.0.6-1.noarch Awaiting for comments Thanks On Thu, Mar 16, 2017 at 5:07 PM, nokia ceph <nokiacephus...@gmail.com> wrote: > Hello, > > Recently we tried top integrate cassandra with NUMA > > == > commented out the numactl --interleave in bin/cassandra and add > -XX:+UseNUMA to cassandra-env.sh. > == > > But after inplementing, we saw HEAP and STACK values were changed to null. > > #/usr/bin/numactl --cpunodebind=1 -- /usr/sbin/cassandra -p > /run/cassandra/cassandra.pid > #numastat -s cassandra > > Per-node process memory usage (in MBs) for PID 13258 (java) > Node 0 Node 1 Total > --------------- --------------- --------------- > *Private 4205.18 4508.09* 8713.28 > Stack 0.00 219.61 219.61 > Heap 0.00 30.52 30.52 > Huge 0.00 0.00 0.00 > ---------------- --------------- --------------- --------------- > Total 4205.18 4758.23 8963.41 > > > Here you can see both Node 0 and Node 1 utilising 4GB. As per our > expectation NODE 0 Private should be zero. I > > Is there any way to specify NODE-0 Private value change to 0? > > Env, > > RHEL7.3 > 3.10.0-514.2.2.el7.x86_64 > cassandra30-3.0.6-1.noarch > > Thanks > >