Just upgraded to Sun JVM 1.6.0_20 and cassandra 0.6.2. Will report back when I have data.
On Thu, May 27, 2010 at 9:39 AM, Philip Stanhope <pstanh...@wimba.com>wrote: > I've seen numerous anecdotal references that the Sun JVM performs better. > > Is there a reason why the debian packaging for Cassandra installs the > OpenJDK version? > What would it take to create an alternative apt-get package that pulls Sun > JVM rather than OpenJDK? > > -phil > > On May 27, 2010, at 12:33 PM, Daniel Kluesing wrote: > > 0.6.0 had some gc issues, (I think > https://issues.apache.org/jira/browse/CASSANDRA-1014) if you see lots of > gc collections in the logs, I’d give 0.6.1 a try, I found it much better. > > Anecdotally, the sun jvm performs better than openJDK, and the u19 drop > fixes some jvm bugs that can cause memory problems. Sun jvm, u19 (or higher) > and Cassandra 0.6.1 fixed a lot of memory problems I ran into. > > *From:* James Golick [mailto:jamesgol...@gmail.com] > *Sent:* Thursday, May 27, 2010 9:05 AM > *To:* user@cassandra.apache.org > *Subject:* Re: Continuously increasing RAM usage > > When I say unresponsive, I mean that latency becomes very high. Swap is > turned off, but before I turned it on, it used to swap heavily at this > point. > > Cassandra version is 0.6.0 Beta1 > > [cassandra1 ~]# java -version > java version "1.6.0" > OpenJDK Runtime Environment (build 1.6.0-b09) > OpenJDK 64-Bit Server VM (build 1.6.0-b09, mixed mode) > > Here is the tpstats from a node that was restarted last night: > > http://gist.github.com/415987 > > On Thu, May 27, 2010 at 8:51 AM, Robert Coli <rc...@digg.com> wrote: > On 5/26/10 11:32 PM, James Golick wrote: > We're seeing RAM usage continually climb until eventually, cassandra > becomes unresponsive. > > Given the handful of bugs related to memory bloat in specific versions of > Cassandra combined with specific versions of JVMs, that information may be > relevant to your question. What version are you running, and in what JVM > environment? > > =Rob > > > >
