That means that the mmaped files are indeed resident at the moment. On Mon, Jul 18, 2011 at 1:51 AM, JKnight JKnight <beukni...@gmail.com> wrote: > Thank for your response. > Do you talk about virtual memory (column VIRT show in top command)? > But I mention about column RES. In my case, VIRT is 61.8G, RES is 3.2G and > SHR is 1.2G. > JMX show Memory Usage: > Used : 600MB, Commit 2.1G, Max: 2.1G > On Mon, Jul 18, 2011 at 11:59 AM, Jonathan Ellis <jbel...@gmail.com> wrote: >> >> http://wiki.apache.org/cassandra/FAQ#mmap >> >> On Sun, Jul 17, 2011 at 11:54 PM, JKnight JKnight <beukni...@gmail.com> >> wrote: >> > Dear all, >> > I use JMX to monitor Cassandra server. >> > Heap Memory Usage show: >> > Used : 600MB, Commit 2.1G, Max: 2.1G >> > But htop show Cassandra process consume 3.1G. >> > Could you tell me why Cassandra occupy memory very large than in used? >> > Thank a lot for support. >> > -- >> > Best regards, >> > JKnight >> > >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of DataStax, the source for professional Cassandra support >> http://www.datastax.com > > > > -- > Best regards, > JKnight >
-- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
