spark性能调优二--JVM调优

一，降低cache占比

SparkConf conf = new SparkConf()
                .setAppName(Constants.SPARK_APP_NAME_SESSION)
                .setMaster("local")
                .set("spark.default.paralelism", "500")
                .set("spark.locality.wait","10")
                .set("spark.storage.memoryFraction","0.5")
                .set("spark.serializer","org.apache.spark.serializer.KryoSerializer")
                .registerKryoClasses(new Class[]{CategorySortKey.class});

二，调节exector堆外内存与连接等待时长

/usr/local/spark/bin/spark-submit \
--class com.ibeifeng.sparkstudy.WordCount \
--num-executors 80 \
--driver-memory 6g \
--executor-memory 6g \
--executor-cores 3 \
--master yarn-cluster \
--queue root.default \
--conf spark.yarn.executor.memoryOverhead=2048 \
--conf spark.core.connection.ack.wait.timeout=300 \
/usr/local/spark/spark.jar \