zzcclp commented on a change in pull request #1495:
URL: https://github.com/apache/kylin/pull/1495#discussion_r538418158
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File path:
kylin-spark-project/kylin-spark-common/src/main/scala/org/apache/spark/sql/execution/datasource/ResetShufflePartition.scala
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@@ -17,25 +17,26 @@
*/
package org.apache.spark.sql.execution.datasource
-import org.apache.kylin.common.{KylinConfig, QueryContext, QueryContextFacade}
+import org.apache.kylin.common.{KylinConfig, QueryContextFacade}
import org.apache.spark.internal.Logging
import org.apache.spark.sql.SparkSession
+import org.apache.spark.utils.SparderUtils
trait ResetShufflePartition extends Logging {
+ val PARTITION_SPLIT_BYTES: Long =
KylinConfig.getInstanceFromEnv.getQueryPartitionSplitSizeMB * 1024 * 1024 //
64MB
def setShufflePartitions(bytes: Long, sparkSession: SparkSession): Unit = {
QueryContextFacade.current().addAndGetSourceScanBytes(bytes)
- val defaultParallelism = sparkSession.sparkContext.defaultParallelism
+ val defaultParallelism =
SparderUtils.getTotalCore(sparkSession.sparkContext.getConf)
val kylinConfig = KylinConfig.getInstanceFromEnv
val partitionsNum = if (kylinConfig.getSparkSqlShufflePartitions != -1) {
kylinConfig.getSparkSqlShufflePartitions
} else {
- Math.min(QueryContextFacade.current().getSourceScanBytes / (
Review comment:
Using 'Math.min' is right, it makes sure that the max partition number
is not larger than the total cores.
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