title: Memory Configurations For Cloudera Impala
body: <p>I'm using Impala, and I know impala does its processing in memory.  I've searched for a list of Impala configuration options, but I haven't found any thorough documentation on this, particularly with regard to memory/heap.  Does Impala have such settings?  Or does it rely on the hdfs/datanode heap space?  I know you can cap impala memory usage with <code>-mem_limit</code>, but I'm trying to better understand how this is done.</p>