我使用的是运行在aws emr 5.30.0上的spark 2.4.5和r5.4x大型示例（16 vcore、128 gib内存、仅ebs存储、ebsstorage:256 gib)：1个主任务、1个核心任务和30个任务。
我在主节点上启动了spark thrift server，它是集群上运行的唯一作业

sudo /usr/lib/spark/sbin/start-thriftserver.sh --conf spark.blacklist.enabled=true --conf spark.blacklist.stage.maxFailedExecutorsPerNode=4 --conf spark.blacklist.task.maxTaskAttemptsPerNode=3 --conf spark.driver.cores=12 --conf spark.driver.maxResultSize=10g --conf spark.driver.memory=86000M --conf spark.driver.memoryOverhead=10240 --conf spark.kryoserializer.buffer.max=768m --conf spark.rpc.askTimeout=700 --conf spark.sql.broadcastTimeout=800 --conf spark.sql.sources.partitionOverwriteMode=dynamic --conf spark.task.maxFailures=20

然后我用jdbc在上面启动sql查询，但是当运行大量查询时，ui会变得非常慢。我想如果我把spark.driver.cores=12（主节点中有16个）和spark.driver.memory=86000m（有128gb的内存）放在一起就可以了，这样主节点就可以运行其他进程了，比如历史服务器，但是它仍然很慢。
所以我想还有其他设置，我可以编辑，以使用户界面工作良好，但我不知道什么。
以下是集群中spark-defaults.conf的设置，仅供参考：

spark.driver.extraClassPath      /usr/lib/hadoop-lzo/lib/*:/usr/lib/hadoop/hadoop-aws.jar:/usr/share/aws/aws-java-sdk/*:/usr/share/aws/emr/emrfs/conf:/usr/share/aws/emr/emrfs/lib/*:/usr/share/aws/emr/emrfs/auxlib/*:/usr/share/aws/emr/goodies/lib/emr-spark-goodies.jar:/usr/share/aws/emr/security/conf:/usr/share/aws/emr/security/lib/*:/usr/share/aws/hmclient/lib/aws-glue-datacatalog-spark-client.jar:/usr/share/java/Hive-JSON-Serde/hive-openx-serde.jar:/usr/share/aws/sagemaker-spark-sdk/lib/sagemaker-spark-sdk.jar:/usr/share/aws/emr/s3select/lib/emr-s3-select-spark-connector.jar
spark.driver.extraLibraryPath    /usr/lib/hadoop/lib/native:/usr/lib/hadoop-lzo/lib/native
spark.executor.extraClassPath    /usr/lib/hadoop-lzo/lib/*:/usr/lib/hadoop/hadoop-aws.jar:/usr/share/aws/aws-java-sdk/*:/usr/share/aws/emr/emrfs/conf:/usr/share/aws/emr/emrfs/lib/*:/usr/share/aws/emr/emrfs/auxlib/*:/usr/share/aws/emr/goodies/lib/emr-spark-goodies.jar:/usr/share/aws/emr/security/conf:/usr/share/aws/emr/security/lib/*:/usr/share/aws/hmclient/lib/aws-glue-datacatalog-spark-client.jar:/usr/share/java/Hive-JSON-Serde/hive-openx-serde.jar:/usr/share/aws/sagemaker-spark-sdk/lib/sagemaker-spark-sdk.jar:/usr/share/aws/emr/s3select/lib/emr-s3-select-spark-connector.jar
spark.executor.extraLibraryPath  /usr/lib/hadoop/lib/native:/usr/lib/hadoop-lzo/lib/native
spark.eventLog.enabled           true
spark.eventLog.dir               hdfs:///var/log/spark/apps
spark.history.fs.logDirectory    hdfs:///var/log/spark/apps
spark.sql.warehouse.dir          hdfs:///user/spark/warehouse
spark.sql.hive.metastore.sharedPrefixes com.amazonaws.services.dynamodbv2
spark.yarn.historyServer.address <xxxxx>:18080
spark.history.ui.port            18080
spark.shuffle.service.enabled    true
spark.yarn.dist.files            /etc/spark/conf/hive-site.xml
spark.driver.extraJavaOptions    -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=70 -XX:MaxHeapFreeRatio=70 -XX:+CMSClassUnloadingEnabled -XX:OnOutOfMemoryError='kill -9 %p'
spark.dynamicAllocation.enabled  true
spark.blacklist.decommissioning.enabled true
spark.blacklist.decommissioning.timeout 1h
spark.resourceManager.cleanupExpiredHost true
spark.stage.attempt.ignoreOnDecommissionFetchFailure true
spark.decommissioning.timeout.threshold 20
spark.executor.extraJavaOptions  -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=70 -XX:MaxHeapFreeRatio=70 -XX:+CMSClassUnloadingEnabled -XX:OnOutOfMemoryError='kill -9 %p'
spark.hadoop.yarn.timeline-service.enabled false
spark.yarn.appMasterEnv.SPARK_PUBLIC_DNS $(hostname -f)
spark.files.fetchFailure.unRegisterOutputOnHost true
spark.hadoop.mapreduce.fileoutputcommitter.algorithm.version.emr_internal_use_only.EmrFileSystem 2
spark.hadoop.mapreduce.fileoutputcommitter.cleanup-failures.ignored.emr_internal_use_only.EmrFileSystem true
spark.hadoop.fs.s3.getObject.initialSocketTimeoutMilliseconds 2000
spark.sql.parquet.output.committer.class com.amazon.emr.committer.EmrOptimizedSparkSqlParquetOutputCommitter
spark.sql.parquet.fs.optimized.committer.optimization-enabled true
spark.sql.emr.internal.extensions com.amazonaws.emr.spark.EmrSparkSessionExtensions
spark.sql.sources.partitionOverwriteMode dynamic
spark.executor.instances         1
spark.executor.cores             16
spark.driver.memory              2048M
spark.executor.memory            109498M
spark.default.parallelism        32
spark.emr.maximizeResourceAllocation true```