KYLIN-2748 fix: modify default permsize to 256m ,improve query performance
KYLIN-2748 fix: modify default permsize to 256m ,improve query performance

apache/incubator-kylin,apache/kylin,apache/kylin,apache/kylin,apache/kylin,apache/kylin,apache/kylin,apache/kylin,apache/incubator-kylin,apache/incubator-kylin,apache/incubator-kylin,apache/incubator-kylin,apache/incubator-kylin