Set this value using the Java Heap Size of ZooKeeper Server in Bytes ZooKeeper configuration property.
|Minimum: 4 cores||
ZooKeeper was not designed to be a low-latency service and does not benefit from the use of SSD drives. The ZooKeeper access patterns – append-only writes and sequential reads – were designed with spinning disks in mind. Therefore Cloudera recommends using HDD drives.