You might want to lower your in memory compaction limit<http://www.datastax.com/docs/0.7/configuration/storage_configuration#in-memory-compaction-limit-in-mb>, but I would also recommend checking your heap size<http://www.datastax.com/docs/0.7/operations/tuning#heap-sizing>and monitoring (with something like jconsole) to see how much heap pressure there is.
On Tue, Mar 29, 2011 at 3:36 PM, Marek Żebrowski <marek.zebrow...@gmail.com>wrote: > Hi, I am getting repeatable OOM during compaction: > > ERROR [CompactionExecutor:1] 2011-03-29 14:52:29,193 > AbstractCassandraDaemon.java (line 112) Fatal exception in thread > Thread[CompactionExecutor:1,1,main] > java.lang.OutOfMemoryError: Java heap space > at java.util.Arrays.copyOf(Arrays.java:2786) > at > java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94) > at java.io.DataOutputStream.write(DataOutputStream.java:90) > at > org.apache.cassandra.utils.ByteBufferUtil.write(ByteBufferUtil.java:237) > at > org.apache.cassandra.utils.ByteBufferUtil.writeWithLength(ByteBufferUtil.java:230) > at > org.apache.cassandra.db.ColumnSerializer.serialize(ColumnSerializer.java:56) > at > org.apache.cassandra.db.ColumnSerializer.serialize(ColumnSerializer.java:35) > at > org.apache.cassandra.db.ColumnFamilySerializer.serializeForSSTable(ColumnFamilySerializer.java:87) > at > org.apache.cassandra.db.ColumnFamilySerializer.serializeWithIndexes(ColumnFamilySerializer.java:106) > at > org.apache.cassandra.io.PrecompactedRow.<init>(PrecompactedRow.java:97) > at > org.apache.cassandra.io.CompactionIterator.getCompactedRow(CompactionIterator.java:147) > at > org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:108) > at > org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:43) > at > org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingIterator.java:73) > at > com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:136) > at > com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:131) > at > org.apache.commons.collections.iterators.FilterIterator.setNextObject(FilterIterator.java:183) > at > org.apache.commons.collections.iterators.FilterIterator.hasNext(FilterIterator.java:94) > at > org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:449) > at > org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:124) > at > org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:94) > at > java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) > at java.util.concurrent.FutureTask.run(FutureTask.java:138) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:662) > > -- > Marek Żebrowski > -- Tyler Hobbs Software Engineer, DataStax <http://datastax.com/> Maintainer of the pycassa <http://github.com/pycassa/pycassa> Cassandra Python client library
