spark session jdbc performance
Hi, I am trying to fetch data from Oracle DB using a subquery and experiencing lot of performance issues. Below is the query I am using, Using Spark 2.0.2 val df = spark_session.read.format("jdbc") .option("driver","oracle.jdbc.OracleDriver") .option("url", jdbc_url) .option("user", user) .option("password", pwd) .option("dbtable", "subquery") .option("partitionColumn", "id") //primary key column uniformly distributed .option("lowerBound", "1") .option("upperBound", "50") .option("numPartitions", 30) .load() The above query is running using the 30 partitions, but when I see the UI it is only using 1 partiton to run the query. Can anyone tell if I am missing anything or do I need to anything else to tune the performance of the query. Thanks The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer.
spark session jdbc performance
Hi, I am trying to fetch data from Oracle DB using a subquery and experiencing lot of performance issues. Below is the query I am using, Using Spark 2.0.2 val df = spark_session.read.format("jdbc") .option("driver","oracle.jdbc.OracleDriver") .option("url", jdbc_url) .option("user", user) .option("password", pwd) .option("dbtable", "subquery") .option("partitionColumn", "id") //primary key column uniformly distributed .option("lowerBound", "1") .option("upperBound", "50") .option("numPartitions", 30) .load() The above query is running using the 30 partitions, but when I see the UI it is only using 1 partiton to run the query. Can anyone tell if I am missing anything or do I need to anything else to tune the performance of the query. Thanks The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer.