run metastore.sh clean --delete true oom

[Fei Yi]

Hi,
Some days I did not cleanup the metadata,when i run metastore.sh clean
--delete true  shows the following error,i set jvm param -Xmx=32g

2017-12-04 10:25:08,506 INFO  [main] cube.CubeManager:795 : Loaded 18
cubes, fail on 0 cubes
2017-12-04 10:26:19,921 INFO  [main] dao.ExecutableDao:75 : Using metadata
url: kylin_metadata@hbase
java.lang.OutOfMemoryError: Java heap space
Dumping heap to java_pid95910.hprof ...
Heap dump file created [561523635 bytes in 2.433 secs]
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="kill -9 %p"
#   Executing /bin/sh -c "kill -9 95910"...
/app/apache-kylin-2.1.0-bin-cdh57/bin/metastore.sh: line 109: 95910 Killed
                ${KYLIN_HOME}/bin/kylin.sh
org.apache.kylin.tool.MetadataCleanupJob
"${@:2}"