@Override
  public void setCapacity(int capacity) {
    haQueueCapacity = capacity;
  }
Sets the capacity of the client client queue. will be in MB for eviction-policy mem else number
of entries

@see #DEFAULT_CAPACITY
@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/ClientSubscriptionConfigImpl.java