Have you followed the recommended prod settings and installed JNA, Oracle JDK etc..?
http://www.datastax.com/documentation/cassandra/2.0/webhelp/index.html#cassandra/install/installRecommendSettings.html On 14 Jan 2014, at 13:16, Dimetrio <dimet...@flysoft.ru> wrote: > Hi all. > I have many GC freezes on my cassandra cluster > > Im using G1 GC and CMS gives similar freezes > JVM_OPTS="$JVM_OPTS -XX:+UseG1GC" > JVM_OPTS="$JVM_OPTS -XX:SurvivorRatio=1" > JVM_OPTS="$JVM_OPTS -XX:NewRatio=1" > JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=15" > JVM_OPTS="$JVM_OPTS -XX:-UseAdaptiveSizePolicy" > JVM_OPTS="$JVM_OPTS -XX:G1HeapRegionSize=32m" > > Heap 8GB > 10 nodes aws c3.4xlarge > 60Gb per node > > Cassandra logs > > > GC logs > > > sometimes node freeze and told that one or two nodes are down > cpu load > 1000% > LA = 6-15 > > pending tasks: 4 > compaction type keyspace table completed > > total unit progress > Compaction Social home_timeline 4097097092 > 4920701908 bytes 83.26% > Compaction Social home_timeline 2713279974 > 6272012039 bytes 43.26% > Active compaction remaining time : 0h00m32s > > 200-300 requests per second on each node with many inserts and deletes > (batch lower than 50) > > How can i reduce GC freezes? > > --regards > > > > > > -- > View this message in context: > http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Cassandra-mad-GC-tp7592248.html > Sent from the cassandra-u...@incubator.apache.org mailing list archive at > Nabble.com.
