Why does cassandra PoolingSegmentedFile recycle the RandomAccessReader? The RandomAccessReader objects consums too much memory.
I have a cluster of 4 nodes. Every node's cassandra jvm has 8G heap. The cassandra's memory is full after about one month, so I have to restart the 4 nodes every month. I have 100G data on every node, with LevedCompactionStrategy and 10M sstable size, so there are more than 10000 sstable files. By looking through the heap dump file, I see there are more than 9000 SSTableReader objects in memory, which references lots of RandomAccessReader objects. The memory is consumed by these RandomAccessReader objects. I see the PoolingSegementedFile has a recycle method, which puts the RandomAccessReader to a queue. Looks like the Queue always grow until the sstable is compacted. Is there any way to stop the RandomAccessReader recycling? Or, set a limit to the recycled RandomAccessReader's number?
