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From Daniel Doubleday <>
Subject Cassandra memory problem
Date Mon, 04 Jul 2011 10:52:25 GMT
Hi all,

we have a mem problem with cassandra. res goes up without bounds (well until the os kills
the process because we dont have swap)

I found a thread that's about the same problem but on OpenJDK:

We are on Debian with Sun JDK.

Resident mem is 7.4G while heap is restricted to 3G.

Anyone else is seeing this with Sun JDK?


:/home/dd# java -version
java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

:/home/dd# ps aux |grep java
cass     28201  9.5 46.8 372659544 7707172 ?   SLl  May24 5656:21 /usr/bin/java -ea -XX:+UseThreadPriorities
-XX:ThreadPriorityPolicy=42 -Xms3000M -Xmx3000M -Xmn400M ...

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                     
28201 cass      20   0  355g 7.4g 1.4g S    8 46.9   5656:25 java

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