Re: mmap I/O and shared memory

This FAQ entry and the linked document provide a pretty good explanation: http://wiki.apache.org/cassandra/FAQ#mmap By the way, you should almost always turn off swap. On Thu, Nov 17, 2011 at 1:16 AM, Jaesung Lee wrote: > I am running 7 nodes cassandra(v1.0.2) cluster. > I am putting 20K rows

mmap I/O and shared memory

I am running 7 nodes cassandra(v1.0.2) cluster. I am putting 20K rows per sec to the cluster. This cluster has 1 KS, 3CFs. Each CF has 4-5 secondary indices. After I'v run for 1 week, nodes use swap memory. I changed disk-access-mode to index_only or standard. I got strange memory results. > usin