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From Peter Schuller <>
Subject Re: how did hprof file generated?
Date Thu, 15 Sep 2011 08:10:13 GMT
> in one of my node, I found many hprof files in the cassandra installation
> directory, they are using as much as 200GB disk space.  other nodes didn't
> have those files.
> turns out that those files are used for memory analyzing, not sure how they
> are generated?

You're probably getting OutOfMemory exceptions. Cassandra by default
runs with -XX:+HeapDumpOnOutOfMemory (or some such, I forget exactly
what it's called). If this is the case, you probably need to increase
your heap size or adjust Cassandra settings.

/ Peter Schuller (@scode on twitter)

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