> 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)
