You are probably seeing this http://wiki.apache.org/cassandra/FAQ#mmap
Cheers ----------------- Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 16/04/2013, at 8:43 PM, Mikhail Mazursky <ash...@gmail.com> wrote: > More details: > > USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND > 219 3801 0.7 92.7 6561116 3567016 ? SLl Mar11 372:44 > /usr/java/latest/bin/java > > Linux XXX@YYY 3.2.30-49.59.amzn1.x86_64 #1 SMP Wed Oct 3 19:54:33 UTC 2012 > x86_64 x86_64 x86_64 GNU/Linux > > total used free shared buffers cached > Mem: 3754 3695 59 0 37 75 > -/+ buffers/cache: 3582 171 > Swap: 2055 165 1890 > > > > 2013/4/16 Mikhail Mazursky <ash...@gmail.com> > Hello. > > C* have been running without any problem for some weeks but now it started to > consume all available ram. > > The cluster have very little data in it. There are no errors in logs, CPU is > not loaded at all, jstack shows no deadlocks, there are 83 threads. > Read/write latency is 1-4ms. > > The question is: how to find out where is the RAM used? > > # nodetool ring keyspace name > Address DC Rack Status State Load > Effective-Ownership Token > > 114967934986393518082067045023985443411 > 10.0.1.220 datacenter1 rack1 Up Normal 889.71 KB > 100.00% 0 > 10.0.1.222 datacenter1 rack1 Up Normal 918.92 KB > 100.00% 56662868904138943096229641828625627278 > 10.0.1.221 datacenter1 rack1 Up Normal 1.04 MB > 100.00% 114967934986393518082067045023985443411 > > We use AWS m1.medium - 3.75 RAM, 1 Core > > java version "1.7.0_10" > Java(TM) SE Runtime Environment (build 1.7.0_10-b18) > Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode) > > C* is started with the following command > /usr/java/latest/bin/java -ea > -javaagent:/usr/share/cassandra/lib/jamm-0.2.5.jar -XX:+UseThreadPriorities > -XX:ThreadPriorityPolicy=42 -Xms1G -Xmx1G -Xmn512M > -XX:+HeapDumpOnOutOfMemoryError -Xss256k -XX:+UseParNewGC > > Thanks in advance. > > Mikhail. >
