Hi guys,     Is there a way to isolate impala daemon resources in one cluster?     eg. 6 daemons in 1 Impala Cluster. Is there a method to isolate 2 daemons' resources for testing, 4 daemons' resources for production? Testing queries only use the memory resource in their daemons.     HAProxy can forward requests to different daemons, but memory resources are not isolated. If query from testing takes too much memories, production query may failed while executing.     The only way I can figure out is setup another impala cluster. I know impala provides admission control, what if the query execution plan estimate memory cost wrong, the actual memory cost is far more than the estimation(eg. 3G VS 150G)? What parameters limit the actual memory usage? ... View more